Cheap flights from Riverside, CA to Barcelona-El Prat (BCN) from $287
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 7/20. 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.
LAX — BCN
Jun 4 — Jun 111
From?
To?
1 adult, Economy
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The best prices from Riverside to Barcelona-El Prat are usually found in February or January, booked 12 days in advance, depart on a Sunday or Tuesday and return on a Friday
Cheap flight deals from Riverside to Barcelona-El Prat
Discover tips and strategies to find the most affordable flight options for your journey from Riverside (R1V) to Barcelona-El Prat (BCN). 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 |
Round-trip from | $510 |
One-way from | $312 |
How far in advance should I book a flight from Riverside to Barcelona-El Prat Airport?
To save on the cost of your flight from Riverside to Barcelona-El Prat Airport, book at least 13 days before your planned departure. Booking around this time can save you about 21% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $690 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $923.
What is the cheapest month to fly from Riverside to Barcelona-El Prat Airport?
Our data shows that February tends to be the cheapest month to fly to Barcelona-El Prat Airport from Riverside. Users have commonly found prices around $772 for the month, but tickets can be as low as $362. Due to multiple factors, prepare for potentially higher prices in June.
What is the cheapest time of day to fly from R1V to BCN?
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Riverside to Barcelona-El Prat Airport as you normally would.
Cheap Vueling flights from Riverside to Barcelona-El Prat
Explore cheap flight options specifically provided by Vueling for the route between Riverside and Barcelona-El Prat. 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.
Peruse some of the lowest-priced Vueling flights we've found from Riverside to Barcelona. Come back soon if you're not finding the exact deal you're looking for.
Mon 10/77:55 pmLAX - BCN
Nonstop11h 45mVueling
Wed 10/232:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/30$382
Mon 10/77:55 pmLAX - BCN
Nonstop11h 45mVueling
Mon 10/142:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/30$416
Wed 10/97:55 pmLAX - BCN
Nonstop11h 45mVueling
Wed 10/162:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/29$422
Wed 10/237:55 pmLAX - BCN
Nonstop11h 45mVueling
Fri 10/252:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/29$425
Wed 10/97:55 pmLAX - BCN
Nonstop11h 45mVueling
Wed 10/162:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/30$427
Wed 10/97:55 pmLAX - BCN
Nonstop11h 45mVueling
Wed 10/162:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/29$428
Mon 10/77:55 pmLAX - BCN
Nonstop11h 45mVueling
Wed 10/232:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/30$429
Wed 10/167:55 pmLAX - BCN
Nonstop11h 45mVueling
Thu 10/242:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/28$430
Fri 7/197:55 pmLAX - BCN
Nonstop11h 45mVueling
Thu 9/192:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/29$448
Cheap Finnair flights from Riverside to Barcelona-El Prat
Explore cheap flight options specifically provided by Finnair for the route between Riverside and Barcelona-El Prat. 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 Finnair flights departing from Riverside and landing in Barcelona. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Sun 10/208:50 pmLAX - BCN
Nonstop11h 45mFinnair
Thu 11/710:05 amBCN - LAX
1 stop16h 00mFinnair
Deal found 5/29$479
Tue 10/1512:30 pmLAX - BCN
1 stop15h 40mFinnair
Thu 11/710:05 amBCN - LAX
1 stop16h 00mFinnair
Deal found 5/30$484
Sun 10/278:25 pmLAX - BCN
Nonstop11h 45mFinnair
Sun 11/1010:05 amBCN - LAX
1 stop16h 00mFinnair
Deal found 5/29$531
Cheap Riverside to Barcelona-El Prat flights in May & June 2024
Find cheap flight options from Riverside to Barcelona-El Prat 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.
These are some of the most attractive deals on flights from Riverside to Barcelona in 2024. Check back regularly for other flight deals.
Sun 6/211:40 amLAX - BCN
1 stop13h 45mAir Canada
Wed 6/1212:25 pmBCN - LAX
1 stop16h 25mAir Canada
Deal found 5/30$696
Thu 5/307:20 amLAX - BCN
2 stops18h 30mMultiple Airlines
Thu 6/66:20 amBCN - LAX
2 stops21h 50mMultiple Airlines
Deal found 5/30$698
Sun 6/211:40 amLAX - BCN
1 stop13h 45mAir Canada
Fri 6/1412:25 pmBCN - LAX
2 stops19h 35mAir Canada
Deal found 5/30$702
Sun 6/29:40 amLAX - BCN
1 stop15h 50mIberia
Sun 6/911:05 amBCN - LAX
1 stop17h 23mIberia
Deal found 5/30$704
Sun 6/211:30 pmLAX - BCN
1 stop22h 15mBritish Airways
Wed 6/121:55 pmBCN - LAX
1 stop15h 52mBritish Airways
Deal found 5/28$705
Tue 6/257:55 pmLAX - BCN
Nonstop11h 45mBritish Airways
Thu 7/412:10 pmBCN - LAX
1 stop17h 00mBritish Airways
Deal found 5/28$706
Sat 6/111:59 pmLAX - BCN
1 stop27h 46mUnited Airlines
Tue 6/1112:25 pmBCN - LAX
1 stop16h 25mUnited Airlines
Deal found 5/30$708
Sun 6/210:50 amLAX - BCN
2 stops16h 55mUnited Airlines
Thu 6/2012:00 pmBCN - LAX
2 stops19h 13mUnited Airlines
Deal found 5/30$709
Mon 6/102:20 pmLAX - BCN
2 stops18h 25mAir Canada
Fri 6/2112:25 pmBCN - LAX
2 stops20h 55mAir Canada
Deal found 5/30$710
Riverside to Barcelona-El Prat 2024 flight deals
Discover exclusive flight deals for travel between Riverside and Barcelona-El Prat 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.
These are some of the most attractive deals on flights from Riverside to Barcelona in 2024. Check back regularly for other flight deals.
Wed 7/39:50 amLAX - BCN
1 stop15h 35mAir Canada
Tue 7/1612:25 pmBCN - LAX
1 stop18h 05mAir Canada
Deal found 5/30$696
Thu 7/113:15 pmLAX - BCN
1 stop23h 00mITA Airways
Thu 7/256:20 amBCN - LAX
1 stop15h 55mITA Airways
Deal found 5/28$697
Mon 9/27:55 pmLAX - BCN
Nonstop11h 45mIberia
Thu 9/192:00 pmBCN - LAX
Nonstop13h 10mIberia
Deal found 5/29$698
Mon 8/125:50 pmLAX - BCN
1 stop29h 10mIberia
Wed 8/282:30 pmBCN - LAX
1 stop34h 35mIberia
Deal found 5/30$699
Sun 8/254:30 pmLAX - BCN
1 stop19h 25mMultiple Airlines
Thu 9/52:00 pmBCN - LAX
Nonstop13h 10mMultiple Airlines
Deal found 5/29$700
Mon 8/195:50 pmLAX - BCN
1 stop29h 10mIberia
Mon 8/266:05 pmBCN - LAX
1 stop31h 00mIberia
Deal found 5/29$701
Wed 12/256:05 pmLAX - BCN
1 stop18h 10mIberia
Sun 1/51:30 pmBCN - LAX
Nonstop13h 10mIberia
Deal found 5/30$702
Wed 7/176:00 amLAX - BCN
2 stops18h 40mAir Canada
Fri 7/2612:25 pmBCN - LAX
1 stop18h 05mAir Canada
Deal found 5/30$703
Thu 9/197:25 pmLAX - BCN
1 stop18h 35mTurkish Airlines
Thu 10/107:50 amBCN - LAX
1 stop36h 50mTurkish Airlines
Deal found 5/29$704
Non-stop flights to Barcelona-El Prat from Riverside
Discover non-stop flight options from Riverside to Barcelona-El Prat. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
To help reduce your travel time, choose from one of these non-stop flights from Riverside to Barcelona. If you're looking for other options for flights from Riverside to Barcelona, make sure to update the search form at the top of page.
Fri 8/167:55 pmLAX - BCN
Nonstop11h 45mIberia
Sat 8/312:55 pmBCN - LAX
Nonstop13h 10mIberia
Deal found 5/29$698
Sun 8/47:55 pmLAX - BCN
Nonstop11h 45mIberia
Wed 8/282:00 pmBCN - LAX
Nonstop13h 10mIberia
Deal found 5/29$700
Sat 8/178:50 pmLAX - BCN
Nonstop11h 45mVueling
Tue 8/272:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/29$702
Sun 8/187:55 pmLAX - BCN
Nonstop11h 45mVueling
Tue 8/272:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/29$703
Sat 8/178:50 pmLAX - BCN
Nonstop11h 45mVueling
Tue 8/272:00 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/29$709
Tue 8/137:55 pmLAX - BCN
Nonstop11h 45mBritish Airways
Thu 8/222:00 pmBCN - LAX
Nonstop13h 10mBritish Airways
Deal found 5/29$715
Mon 8/197:55 pmLAX - BCN
Nonstop11h 45mIberia
Wed 10/92:00 pmBCN - LAX
Nonstop13h 10mIberia
Deal found 5/29$718
Mon 7/17:55 pmLAX - BCN
Nonstop11h 45mVueling
Sat 8/312:55 pmBCN - LAX
Nonstop13h 10mVueling
Deal found 5/29$720
Sat 7/208:50 pmLAX - BCN
Nonstop11h 45mIberia
Tue 8/272:00 pmBCN - LAX
Nonstop13h 10mIberia
Deal found 5/28$721
Riverside to Barcelona-El Prat flights leaving soon
Find last-minute flight options from Riverside to Barcelona-El Prat for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. 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 flights available from Riverside to Barcelona departing last-minute. Tip: verify your flight details before completing your reservation.
Tue 6/46:00 amLAX - BCN
2 stops18h 40mAir Canada
Tue 6/1112:25 pmBCN - LAX
2 stops19h 35mAir Canada
Deal found 5/30$696
Tue 6/45:50 pmLAX - BCN
1 stop14h 30mIberia
Fri 6/142:00 pmBCN - LAX
Nonstop13h 10mIberia
Deal found 5/29$698
Tue 6/46:12 amLAX - BCN
1 stop17h 48mAmerican Airlines
Tue 6/1112:50 pmBCN - LAX
1 stop20h 21mAmerican Airlines
Deal found 5/29$705
Sun 6/99:10 pmLAX - BCN
1 stop25h 35mMultiple Airlines
Thu 6/137:00 amBCN - LAX
1 stop16h 10mMultiple Airlines
Deal found 5/29$708
Tue 6/47:00 amLAX - BCN
1 stop14h 45mAmerican Airlines
Thu 7/187:45 amBCN - LAX
1 stop19h 18mAmerican Airlines
Deal found 5/29$711
Sat 6/811:59 pmLAX - BCN
1 stop27h 46mUnited Airlines
Wed 6/2611:15 amBCN - LAX
1 stop18h 01mUnited Airlines
Deal found 5/30$713
Tue 6/47:40 pmLAX - BCN
1 stop14h 35mSWISS
Wed 6/126:00 amBCN - LAX
1 stop19h 15mSWISS
Deal found 5/28$715
Sun 6/99:10 pmLAX - BCN
2 stops25h 30mMultiple Airlines
Thu 6/137:00 amBCN - LAX
1 stop16h 10mMultiple Airlines
Deal found 5/29$719
Tue 6/45:50 pmLAX - BCN
1 stop14h 30mIberia
Tue 6/119:45 amBCN - LAX
1 stop15h 20mIberia
Deal found 5/29$720
One-way flights to Barcelona-El Prat from Riverside
Search for one-way flight options from Riverside to Barcelona-El Prat. 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.
Some of the best available deals we've found on one-way flights from Riverside to Barcelona. Users in need of a round-trip flight from Riverside to Barcelona instead should update the search form at the top of page.
Sat 7/208:50 pmLAX - BCN
Nonstop11h 45mVueling
Deal found 5/30$287
Thu 7/114:30 pmLAX - BCN
1 stop19h 40mMultiple Airlines
Deal found 5/29$290
Sun 7/144:30 pmLAX - BCN
1 stop33h 40mMultiple Airlines
Deal found 5/30$293
Sun 7/149:10 pmLAX - BCN
1 stop25h 35mMultiple Airlines
Deal found 5/28$294
Mon 7/159:10 pmLAX - BCN
1 stop28h 50mMultiple Airlines
Deal found 5/29$299
Mon 7/89:10 pmLAX - BCN
2 stops37h 00mMultiple Airlines
Deal found 5/28$301
Sat 8/248:50 pmLAX - BCN
Nonstop11h 45mVueling
Deal found 5/30$303
Tue 7/97:55 pmLAX - BCN
Nonstop11h 45mVueling
Deal found 5/29$306
Mon 7/87:55 pmLAX - BCN
Nonstop11h 45mVueling
Deal found 5/30$308
Find flights from Riverside to Barcelona-El Prat within your budget
Customize your flight search to find flights from Riverside to Barcelona-El Prat 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
$382 - $507
Route
Depart
Return
Price
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Mon 10/7
Nonstop11h 45m
Barcelona-El Prat
Wed 10/23
Nonstop13h 10m
$382
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Mon 10/7
Nonstop11h 45m
Barcelona-El Prat
Wed 10/23
Nonstop13h 10m
$419
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Sun 10/20
1 stop16h 10m
Barcelona-El Prat
Thu 11/7
1 stop21h 16m
$468
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Tue 10/29
1 stop15h 05m
Barcelona-El Prat
Thu 11/7
Nonstop13h 10m
$473
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Tue 11/12
1 stop14h 00m
Barcelona-El Prat
Thu 11/28
1 stop17h 07m
$475
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Wed 11/20
2 stops17h 50m
Barcelona-El Prat
Fri 12/6
2 stops17h 54m
$477
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Sun 10/20
Nonstop11h 45m
Barcelona-El Prat
Thu 11/7
1 stop16h 00m
$479
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Tue 10/29
1 stop16h 40m
Barcelona-El Prat
Tue 11/12
1 stop25h 22m
$483
Los AngelesBarcelona-El Prat
LAX - BCN
LAXBCN
Los Angeles
Mon 9/16
1 stop18h 25m
Barcelona-El Prat
Wed 9/25
1 stop26h 40m
$507
How far ahead should I book a flight from Riverside to Barcelona-El Prat Airport?
Use this chart to determine the optimal time to book a round-trip flight from Riverside to Barcelona-El Prat. Price data was last updated on May 24, 2024.
Booking 12 days in advance of your planned departure date is, on average, the best time to get cheap flights from Riverside to Barcelona-El Prat Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Riverside to Barcelona-El Prat Airport?
Use this chart to determine the cheapest time to fly round-trip from Riverside to Barcelona-El Prat. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Riverside to Barcelona-El Prat Airport flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Best time to book a flight from Riverside to Barcelona-El Prat
Have a flexible travel schedule? Discover the best time to fly to Barcelona-El Prat from Riverside 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 Barcelona-El Prat by month
Plan your trip to Barcelona-El Prat by taking into account the average temperature and rainfall totals by month.
BCN Temperature | 48.2 - 75.2 °F |
|---|
Reviews of airlines servicing Barcelona-El Prat
Get insights into the airlines that provide service to Barcelona-El Prat. 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 Barcelona-El Prat. Reviews last updated May 30, 2024.
Read reviews from past customers who have flown Vueling, Finnair and British Airways from Riverside to Barcelona. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
10,457 reviews
Entertainment
8.0
Comfort
7.9
Food
7.4
Boarding
8.2
Overall
8.0
Crew
8.6
Reviews
1 / 10
Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
10,457 reviews
10,457 reviews
Entertainment
8.0
Comfort
7.9
Food
7.4
Boarding
8.2
Overall
8.0
Crew
8.6
Reviews
1 / 10
Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
1,372 reviews
10,457 reviews
Entertainment
8.0
Comfort
7.9
Food
7.4
Boarding
8.2
Overall
8.0
Crew
8.6
Reviews
1 / 10
Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
2,866 reviews
10,457 reviews
Entertainment
8.0
Comfort
7.9
Food
7.4
Boarding
8.2
Overall
8.0
Crew
8.6
Reviews
1 / 10
Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
1,402 reviews
10,457 reviews
Entertainment
8.0
Comfort
7.9
Food
7.4
Boarding
8.2
Overall
8.0
Crew
8.6
Reviews
1 / 10
Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
10,777 reviews
10,457 reviews
Entertainment
8.0
Comfort
7.9
Food
7.4
Boarding
8.2
Overall
8.0
Crew
8.6
Reviews
1 / 10
Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Related info for your journey
Find useful and relevant information for your journey from Riverside to Barcelona-El Prat. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Riverside to Barcelona-El PratSee prices for flight routes from nearby airports that may be better suited for you.
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from Riverside to Barcelona-El Prat
Discover the top 10 airlines that operate flights from Riverside to Barcelona-El Prat. 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.
Search flights from Riverside to Barcelona-El Prat by cabin class
Find flights from Riverside to Barcelona-El Prat, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Hourly flight availability from Riverside to Barcelona-El Prat
Find hourly flight availability from Riverside to Barcelona-El Prat. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 30, 2024.
| 0%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 0%of flight departures | Morning6 am to noon |
| 0%of flight departures | AfternoonNoon to 6 pm |
| 100%of flight departures | Evening6 pm to midnight |
Midnight
6 AM
Noon
6 PM
Weekly flight availability from Riverside to Barcelona-El Prat
Explore weekly flight availability from Riverside to Barcelona-El Prat. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 30, 2024.
| Sunday | 4daily flights |
|---|---|
| Monday | 0daily flights |
| Tuesday | 4daily flights |
| Wednesday | 0daily flights |
| Thursday | 0daily flights |
| Friday | 0daily flights |
| Saturday | 0daily flights |
Book a flight to one of these trending destinations
User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
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 Riverside to Barcelona-El Prat?
When you search for this flight from Riverside to Barcelona-El Prat, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Riverside to Barcelona-El Prat?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Riverside to Barcelona-El Prat for you. Better yet — we are completely free to use.
Can Cheapflights find flights from Riverside to Barcelona-El Prat with no change fees?
Certainly. Search results for flights to Barcelona-El Prat from Riverside shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
Can Cheapflights notify me if prices for flights from Riverside to Barcelona-El Prat become cheaper?
Yes, Cheapflights offers price alerts on Riverside to Barcelona-El Prat flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.