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Cheap flights from Seattle (SEA) to Basel EuroAirport Swiss (BSL) from $425

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — BSL
Jun 4 — Jun 111
From?
To?
Tue 6/4
Tue 6/11
1 adult, Economy
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Cheap flight deals from Seattle to Basel

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Basel (BSL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 30, 2024.

Popular in

June

Cheapest in

February

Average price

$1,255

Round-trip from

$558
High demand for flights, 41% potential price rise
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Best time to find cheap flights, 37% potential price drop
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Average for round-trip flights in May 2024
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From Seattle/Tacoma Intl to Basel EuroAirport Swiss
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What is the cheapest day to fly round-trip from Seattle to Basel EuroAirport Swiss?

Thursday flights are generally found to be more expensive for flights from Seattle to Basel EuroAirport Swiss. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Basel EuroAirport Swiss.

What is the cheapest month to fly from Seattle to Basel EuroAirport Swiss?

Flights from Seattle to Basel EuroAirport Swiss lean towards being more expensive in June. Prices are generally better when you fly from Seattle to Basel EuroAirport Swiss in November, with the cheapest ticket starting at $494.

What is the cheapest time of day to fly from SEA to BSL?

A simple way to save on the total cost of your ticket is to fly from Seattle to Basel EuroAirport Swiss in the evening. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight in the afternoon.

Cheap Delta flights from Seattle to Basel

Explore cheap flight options specifically provided by Delta for the route between Seattle and Basel. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Take a peek at the cheapest Delta flights we've detected traveling from Seattle to Basel. Make sure to check back often as deals are often changing.
Fri 8/231:40 pmSEA - BSL
2 stops19h 15mDelta
Wed 8/282:20 pmBSL - SEA
2 stops18h 39mDelta
Deal found 5/30$893
Wed 7/171:35 pmSEA - BSL
1 stop19h 30mDelta
Wed 7/2410:15 amBSL - SEA
2 stops20h 10mDelta
Deal found 5/29$1,030
Thu 7/186:15 pmSEA - BSL
1 stop14h 50mDelta
Thu 7/2510:55 amBSL - SEA
1 stop15h 40mDelta
Deal found 5/29$1,067
Thu 7/181:35 pmSEA - BSL
1 stop19h 30mDelta
Fri 7/266:20 amBSL - SEA
1 stop12h 55mDelta
Deal found 5/29$1,070
Thu 7/186:15 pmSEA - BSL
1 stop14h 50mDelta
Thu 7/2510:55 amBSL - SEA
2 stops20h 30mDelta
Deal found 5/29$1,078
Thu 7/187:10 amSEA - BSL
2 stops17h 35mDelta
Fri 7/266:20 amBSL - SEA
1 stop12h 55mDelta
Deal found 5/29$1,087
Thu 7/189:52 amSEA - BSL
2 stops18h 58mDelta
Thu 7/2510:55 amBSL - SEA
2 stops20h 30mDelta
Deal found 5/29$1,095
Thu 7/181:35 pmSEA - BSL
1 stop19h 30mDelta
Thu 7/2510:55 amBSL - SEA
1 stop15h 40mDelta
Deal found 5/30$1,110
Thu 7/186:15 pmSEA - BSL
1 stop14h 50mDelta
Fri 7/266:20 amBSL - SEA
1 stop12h 55mDelta
Deal found 5/30$1,112

Cheap United Airlines flights from Seattle to Basel

Explore cheap flight options specifically provided by United Airlines for the route between Seattle and Basel. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Have a look at some of the cheapest available United Airlines flights departing from Seattle and landing in Basel. Make sure to examine the flight information before completing your reservation.
Sat 8/312:30 amSEA - BSL
2 stops34h 05mUnited Airlines
Thu 8/228:10 pmBSL - SEA
2 stops31h 42mUnited Airlines
Deal found 5/29$725
Sat 8/1012:30 amSEA - BSL
2 stops34h 05mUnited Airlines
Mon 8/198:10 pmBSL - SEA
2 stops38h 13mUnited Airlines
Deal found 5/29$760
Sat 8/312:30 amSEA - BSL
2 stops34h 05mUnited Airlines
Thu 8/228:10 pmBSL - SEA
1 stop29h 49mUnited Airlines
Deal found 5/29$891
Sun 7/2812:30 amSEA - BSL
2 stops34h 05mUnited Airlines
Tue 8/69:40 amBSL - SEA
2 stops22h 53mUnited Airlines
Deal found 5/29$990
Thu 7/183:37 pmSEA - BSL
2 stops18h 58mUnited Airlines
Thu 7/252:15 pmBSL - SEA
2 stops19h 27mUnited Airlines
Deal found 5/28$1,074
Thu 7/186:45 amSEA - BSL
3 stops27h 50mUnited Airlines
Fri 7/269:40 amBSL - SEA
2 stops21h 50mUnited Airlines
Deal found 5/29$1,090
Wed 7/1712:30 amSEA - BSL
2 stops34h 05mUnited Airlines
Fri 7/266:40 amBSL - SEA
1 stop14h 35mUnited Airlines
Deal found 5/30$1,099
Thu 7/182:15 pmSEA - BSL
1 stop18h 25mUnited Airlines
Thu 7/252:15 pmBSL - SEA
2 stops19h 27mUnited Airlines
Deal found 5/28$1,105
Wed 7/1712:30 amSEA - BSL
2 stops34h 05mUnited Airlines
Thu 7/256:40 amBSL - SEA
1 stop14h 35mUnited Airlines
Deal found 5/29$1,114

Cheap Seattle to Basel flights in May & June 2024

Find cheap flight options from Seattle to Basel specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Prices were last updated on May 30, 2024.
Check out some of the best flight deals from Seattle to Basel in 2024. Check back regularly for other flight deals.
Wed 6/125:20 pmSEA - BSL
1 stop15h 20mMultiple Airlines
Thu 6/139:10 pmBSL - SEA
2 stops32h 25mMultiple Airlines
Deal found 5/30$1,337
Wed 6/127:40 amSEA - BSL
3 stops21h 00mMultiple Airlines
Thu 6/136:20 pmBSL - SEA
3 stops26h 00mMultiple Airlines
Deal found 5/30$1,882
Wed 6/127:40 amSEA - BSL
1 stop14h 35mMultiple Airlines
Thu 6/136:20 pmBSL - SEA
1 stop29h 30mMultiple Airlines
Deal found 5/30$1,953
Wed 6/122:30 pmSEA - BSL
2 stops14h 10mMultiple Airlines
Thu 6/136:20 pmBSL - SEA
3 stops26h 00mMultiple Airlines
Deal found 5/30$2,112
Wed 6/125:55 amSEA - BSL
3 stops27h 10mMultiple Airlines
Thu 6/138:15 pmBSL - SEA
1 stop29h 44mMultiple Airlines
Deal found 5/30$2,215

Seattle to Basel 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Basel in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Check out some of the best flight deals from Seattle to Basel in 2024. Check back regularly for other flight deals.
Wed 11/66:45 pmSEA - BSL
1 stop18h 15mBritish Airways
Wed 11/206:25 amBSL - SEA
1 stop19h 20mBritish Airways
Deal found 5/29$425
Sun 11/36:45 pmSEA - BSL
1 stop15h 10mBritish Airways
Thu 11/1411:10 amBSL - SEA
1 stop14h 35mBritish Airways
Deal found 5/29$426
Tue 11/57:50 amSEA - BSL
2 stops17h 35mMultiple Airlines
Mon 11/117:55 pmBSL - SEA
1 stop24h 30mMultiple Airlines
Deal found 5/29$430
Wed 10/307:45 pmSEA - BSL
1 stop14h 35mBritish Airways
Tue 11/127:00 amBSL - SEA
2 stops21h 03mBritish Airways
Deal found 5/29$435
Sun 11/36:45 pmSEA - BSL
1 stop18h 30mMultiple Airlines
Tue 11/127:00 amBSL - SEA
2 stops21h 03mMultiple Airlines
Deal found 5/29$436
Wed 11/61:39 pmSEA - BSL
2 stops19h 41mBritish Airways
Wed 11/1311:10 amBSL - SEA
2 stops19h 33mBritish Airways
Deal found 5/30$440
Mon 11/256:45 pmSEA - BSL
1 stop17h 50mMultiple Airlines
Wed 12/411:10 amBSL - SEA
1 stop14h 35mMultiple Airlines
Deal found 5/29$464
Wed 10/3012:01 pmSEA - BSL
2 stops22h 19mAmerican Airlines
Tue 11/127:00 amBSL - SEA
2 stops22h 50mAmerican Airlines
Deal found 5/29$467
Sun 11/37:50 amSEA - BSL
2 stops17h 35mMultiple Airlines
Mon 11/117:55 pmBSL - SEA
1 stop24h 30mMultiple Airlines
Deal found 5/29$471

One-way flights to Basel from Seattle

Search for one-way flight options from Seattle to Basel. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Take a look at some of the one-way flights we've detected from Seattle to Basel. For those needing a return trip from Seattle, there is a search form available above.
Fri 6/288:19 amSEA - BSL
2 stops17h 11mMultiple Airlines
Deal found 5/30$882
Fri 6/285:40 pmSEA - BSL
1 stop15h 00mMultiple Airlines
Deal found 5/30$1,120

Find flights from Seattle to Basel within your budget

Customize your flight search to find flights from Seattle to Basel that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$567 - $1,145

Route

Depart

Return

Price

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/4

2 stops24h 29m

Basel EuroAirport Swiss

Thu 8/22

2 stops23h 06m

$567

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/4

1 stop18h 15m

Basel EuroAirport Swiss

Thu 8/22

2 stops24h 21m

$592

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/4

1 stop18h 15m

Basel EuroAirport Swiss

Thu 8/22

2 stops23h 06m

$613

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/4

1 stop18h 15m

Basel EuroAirport Swiss

Thu 8/22

1 stop13h 55m

$654

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/4

1 stop14h 45m

Basel EuroAirport Swiss

Thu 8/22

1 stop24h 50m

$712

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sat 8/3

2 stops34h 05m

Basel EuroAirport Swiss

Thu 8/22

2 stops31h 42m

$725

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Fri 8/23

2 stops19h 15m

Basel EuroAirport Swiss

Wed 8/28

2 stops18h 39m

$893

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 7/17

2 stops15h 30m

Basel EuroAirport Swiss

Wed 7/24

2 stops17h 50m

$1,035

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Thu 7/18

1 stop18h 25m

Basel EuroAirport Swiss

Thu 7/25

1 stop14h 35m

$1,145

Flights are sorted by cheapest first

Deals found on 5/29

What is the cheapest day to fly from Seattle to Basel EuroAirport Swiss?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Basel. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Basel EuroAirport Swiss flight should consider departing on Sunday afternoons when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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Best time to book a flight from Seattle to Basel

Have a flexible travel schedule? Discover the best time to fly to Basel from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Basel by month

Plan your trip to Basel by taking into account the average temperature and rainfall totals by month.

EAP

Temperature

33.8 - 66.2 °F

Reviews of airlines servicing Basel

Get insights into the airlines that provide service to Basel. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Basel. Reviews last updated May 30, 2024.
Read through reviews of airlines operating flights from Seattle to Basel, such as Delta, United Airlines and Air France. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,457 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,457 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air France
7.5
Good
1,730 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

United Airlines
7.4
Good
10,777 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

American Airlines
7.3
Good
14,284 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Lufthansa
7.0
Good
7,582 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Basel. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Seattle to Basel EuroAirport Swiss for under $600 on Cheapflights?

    Yes, there are multiple flights from Seattle to Basel EuroAirport Swiss for under $600. The cheapest flight booked recently is on American Airlines for just $567, but on average you can expect to pay $815.

  • What are the cheapest airlines flying from Seattle to Basel EuroAirport Swiss round-trip?

    American Airlines, at $567, was found to be the cheapest airline from Seattle to Basel EuroAirport Swiss.Alternate airlines to your destination round-trip include British Airways and Air France. You may be able to fly from Seattle to Basel EuroAirport Swiss for 39% less than the average price by searching for these airlines.

  • What does SEA to BSL mean?

    SEA stands for Seattle/Tacoma Intl Airport, while BSL stands for Basel EuroAirport Swiss. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Seattle to Basel that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to Basel flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to Basel with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Basel flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Seattle to Basel that include hotel bookings?

    Yes. In addition to deals on Seattle to Basel flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Basel?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Basel.

  • Can I find deals for business class flights from Seattle to Basel?

    Yes. Cheapflights offers flight deals from Seattle to Basel by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Seattle to Basel that allow pets onboard?

    Many airlines flying from Seattle to Basel offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to Basel?

    Yes, you can often find last-minute deals on Seattle to Basel flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to Basel EuroAirport Swiss flight deals updated?

    The Seattle to Basel EuroAirport Swiss flight deals you see on this page were last updated on 5/30.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Basel
See prices for flight routes from nearby airports that may be better suited for you.

Portland to Basel flights

Top 2 airlines flying from Seattle to Basel

Discover the top 2 airlines that operate flights from Seattle to Basel. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$557Average$1,120FlexibilityNo cancel feeOn-time70%
Search British Airways flights
DeltaCheapest$719Average$1,271FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
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Search flights from Seattle to Basel by cabin class

Find flights from Seattle to Basel, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Basel?

Cheapflights makes it easy to find Seattle to Basel flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Basel?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Basel.

Can Cheapflights find flights from Seattle to Basel with no change fees?

Yes, we can. To see specific flights from Seattle to Basel with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Basel become cheaper?

Not ready to book yet? You can track prices for flights from Seattle to Basel on Cheapflights with our Price Alert feature and get notified when better prices are available.

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