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Cheap flights from St. Louis to Idaho Falls (STL - IDA) from $288

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/23. 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.
STL — IDA
Jun 15 — Jun 221
From?
To?
Sat 6/15
Sat 6/22
1 adult, Economy
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Cheap flight deals from St. Louis to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Idaho Falls (IDA). 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 June 10, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$397

One-way from

$288
High demand for flights, 16% potential price rise
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Best time to find cheap flights, 30% potential price drop
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From Lambert-St Louis to Idaho Falls Fanning Field
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One-way flight from Lambert-St Louis to Idaho Falls Fanning Field
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What is the cheapest day to fly round-trip from St. Louis to Idaho Falls?

Users have found that leaving on a Friday can be a cost-effective option. It’s possible to save up to 58% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from St. Louis to Idaho Falls?

Our data shows that February tends to be the cheapest month to fly to Idaho Falls from St. Louis. Users have commonly found prices around $588 for the month, but tickets can be as low as $313. Due to multiple factors, prepare for potentially higher prices in June.

What is the cheapest time of day to fly from STL to IDA?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Idaho Falls at noon. If you’re flexible enough to do this you can expect to save up to 11% on your trip compared to booking a flight in the afternoon.

Cheap St. Louis to Idaho Falls flights in June & July 2024

Find cheap flight options from St. Louis to Idaho Falls specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,080,152 searches. Prices were last updated on June 10, 2024.
Check out some of the best flight deals from St. Louis to Idaho Falls in 2024. Check back in a little while for more flight options.
Thu 7/46:22 pmSTL - IDA
2 stops15h 32mMultiple Airlines
Fri 7/127:15 pmIDA - STL
3 stops21h 14mMultiple Airlines
Deal found 6/9$458
Thu 7/46:22 pmSTL - IDA
3 stops25h 03mMultiple Airlines
Fri 7/127:15 pmIDA - STL
3 stops21h 14mMultiple Airlines
Deal found 6/9$546
Wed 7/3110:19 amSTL - IDA
1 stop12h 20mAmerican Airlines
Wed 8/76:14 amIDA - STL
1 stop11h 25mAmerican Airlines
Deal found 6/9$547
Thu 7/49:08 amSTL - IDA
1 stop13h 00mUnited Airlines
Fri 7/125:59 pmIDA - STL
2 stops19h 37mUnited Airlines
Deal found 6/9$550
Thu 7/45:30 pmSTL - IDA
2 stops28h 38mUnited Airlines
Fri 7/125:59 pmIDA - STL
2 stops19h 37mUnited Airlines
Deal found 6/9$555
Thu 7/49:08 amSTL - IDA
1 stop13h 00mUnited Airlines
Fri 7/125:59 pmIDA - STL
1 stop27h 21mUnited Airlines
Deal found 6/9$571
Sat 7/275:52 pmSTL - IDA
1 stop5h 18mDelta
Fri 8/96:59 pmIDA - STL
1 stop4h 56mDelta
Deal found 6/9$576
Tue 7/306:06 amSTL - IDA
2 stops7h 17mDelta
Tue 8/66:59 pmIDA - STL
1 stop4h 56mDelta
Deal found 6/9$581
Tue 7/306:06 amSTL - IDA
2 stops7h 17mDelta
Thu 8/86:59 pmIDA - STL
2 stops13h 15mDelta
Deal found 6/9$586

St. Louis to Idaho Falls 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Idaho Falls in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,080,152 searches. Data last updated June 10, 2024.
Check out some of the best flight deals from St. Louis to Idaho Falls in 2024. Check back in a little while for more flight options.
Sat 10/57:00 amSTL - IDA
1 stop17h 57mAlaska Airlines
Tue 10/86:10 amIDA - STL
1 stop16h 48mAlaska Airlines
Deal found 6/9$382
Fri 10/112:25 pmSTL - IDA
1 stop25h 46mAlaska Airlines
Tue 10/153:50 pmIDA - STL
1 stop7h 08mAlaska Airlines
Deal found 6/10$422
Thu 7/46:22 pmSTL - IDA
2 stops15h 32mMultiple Airlines
Fri 7/127:15 pmIDA - STL
3 stops21h 14mMultiple Airlines
Deal found 6/9$458
Thu 8/294:18 pmSTL - IDA
1 stop6h 13mAmerican Airlines
Tue 9/36:14 amIDA - STL
1 stop8h 13mAmerican Airlines
Deal found 6/9$468
Sat 8/176:00 amSTL - IDA
2 stops16h 31mAmerican Airlines
Fri 8/236:14 amIDA - STL
1 stop8h 13mAmerican Airlines
Deal found 6/9$497
Sat 8/177:32 pmSTL - IDA
1 stop29h 25mAlaska Airlines
Fri 8/234:20 pmIDA - STL
1 stop6h 39mAlaska Airlines
Deal found 6/9$502
Wed 8/76:00 amSTL - IDA
2 stops16h 31mAmerican Airlines
Wed 8/146:14 amIDA - STL
2 stops15h 03mAmerican Airlines
Deal found 6/9$505
Sat 8/175:52 pmSTL - IDA
1 stop5h 18mDelta
Sat 8/246:10 amIDA - STL
1 stop7h 23mDelta
Deal found 6/9$522
Sat 8/1711:00 amSTL - IDA
2 stops27h 28mUnited Airlines
Sat 8/245:55 pmIDA - STL
2 stops20h 54mUnited Airlines
Deal found 6/9$525

One-way flights to Idaho Falls from St. Louis

Search for one-way flight options from St. Louis to Idaho Falls. 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 3,080,152 searches. Data last updated June 10, 2024.
Some of the best available deals we've found on one-way flights from St. Louis to Idaho Falls. Those seeking round-trip flights from St. Louis to Idaho Falls should utilize the search form at the the top of the page.
Tue 7/237:55 amSTL - IDA
1 stop5h 31mDelta
Deal found 6/9$288
Tue 7/2310:04 amSTL - IDA
2 stops9h 12mDelta
Deal found 6/9$293
Mon 6/174:45 pmSTL - IDA
1 stop5h 23mUnited Airlines
Deal found 6/9$357
Mon 6/1711:38 amSTL - IDA
2 stops10h 30mUnited Airlines
Deal found 6/9$362
Tue 7/235:03 pmSTL - IDA
3 stops25h 15mUnited Airlines
Deal found 6/9$484

Find flights from St. Louis to Idaho Falls within your budget

Customize your flight search to find flights from St. Louis to Idaho Falls 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 3,080,152 searches. Data last updated June 10, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$382 - $535

Route

Depart

Return

Price

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sat 10/5

1 stop17h 57m

Idaho Falls Fanning Field

Tue 10/8

1 stop16h 48m

$382

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Fri 10/11

1 stop25h 46m

Idaho Falls Fanning Field

Tue 10/15

1 stop7h 08m

$422

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Thu 7/4

2 stops15h 32m

Idaho Falls Fanning Field

Fri 7/12

3 stops21h 14m

$458

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Thu 8/29

1 stop6h 13m

Idaho Falls Fanning Field

Tue 9/3

1 stop8h 13m

$468

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sat 8/17

2 stops16h 31m

Idaho Falls Fanning Field

Fri 8/23

1 stop8h 13m

$497

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sat 8/17

1 stop5h 18m

Idaho Falls Fanning Field

Sat 8/24

1 stop7h 23m

$522

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sat 8/17

2 stops27h 28m

Idaho Falls Fanning Field

Sat 8/24

2 stops20h 54m

$525

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sat 8/17

2 stops13h 01m

Idaho Falls Fanning Field

Fri 8/23

2 stops9h 53m

$532

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Wed 8/7

1 stop20h 50m

Idaho Falls Fanning Field

Wed 8/14

1 stop17h 50m

$535

Flights are sorted by cheapest first

Deals found on 6/9

What is the cheapest day to fly from St. Louis to Idaho Falls?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Idaho Falls. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Idaho Falls flight should consider departing on Tuesday mornings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from St. Louis to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from St. Louis 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 Idaho Falls by month

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

IDA

Temperature

23 - 69.8 °F

If weather is an important factor for your trip to Idaho Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. 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 Idaho Falls. Reviews last updated June 10, 2024.
Read reviews from past customers who have flown Alaska Airlines, American Airlines and Delta from St. Louis to Idaho Falls. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,254 reviews

Food

7.3

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

Alaska Airlines
8.1
Very good
9,254 reviews
Alaska Airlines
8.1
Very good
9,254 reviews

Food

7.3

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

Delta
8.0
Very good
10,295 reviews
Alaska Airlines
8.1
Very good
9,254 reviews

Food

7.3

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

United Airlines
7.4
Good
10,647 reviews
Alaska Airlines
8.1
Very good
9,254 reviews

Food

7.3

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

American Airlines
7.3
Good
14,138 reviews
Alaska Airlines
8.1
Very good
9,254 reviews

Food

7.3

Comfort

7.9

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.3

Reviews

1 / 10

Crew and airport staff were excellent. They accommodated my needs and were super professional and kind.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Idaho Falls. 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 St. Louis to Idaho Falls for under $400 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Idaho Falls for under $400. The cheapest flight booked recently is on Alaska Airlines for just $382, but on average you can expect to pay $519.

  • What are the cheapest airlines flying from St. Louis to Idaho Falls round-trip?

    Alaska Airlines, at $382, was found to be the cheapest airline from St. Louis to Idaho Falls.Alternate airlines to your destination round-trip include American Airlines and Delta. Alaska Airlines is priced at 35% lower than the current average price of a flight leaving 3 months from now.

  • What does STL to IDA mean?

    STL and IDA are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. STL to IDA refers to a flight route from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport.

  • Can I find deals for flights from St. Louis to Idaho Falls that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Idaho Falls 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 St. Louis to Idaho Falls with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Idaho Falls 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 St. Louis to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on St. Louis to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Idaho Falls.

  • Can I find deals for business class flights from St. Louis to Idaho Falls?

    Yes. Cheapflights offers flight deals from St. Louis to Idaho Falls 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 St. Louis to Idaho Falls that allow pets onboard?

    Many airlines flying from St. Louis to Idaho Falls 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 St. Louis to Idaho Falls?

    Yes, you can often find last-minute deals on St. Louis to Idaho Falls 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 St. Louis to Idaho Falls flight deals updated?

    The St. Louis to Idaho Falls flight deals you see on this page were last updated on 6/10.

  • What is the cheapest month to book a flight from St. Louis to Idaho Falls?

    Currently, December is the cheapest month in which you can book a flight from St. Louis to Idaho Falls (average of $397). Flying from St. Louis to Idaho Falls in June is currently the most expensive (average of $618). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.

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Top 2 airlines flying from St. Louis to Idaho Falls

Discover the top 2 airlines that operate flights from St. Louis to Idaho Falls. 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 3,080,152 searches. Data last updated June 10, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$364Average$595FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$413Average$616FlexibilityNo cancel feeOn-time69%
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Search flights from St. Louis to Idaho Falls by cabin class

Find flights from St. Louis to Idaho Falls, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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