$324+ Cheap flights from St. Louis (STL) to Barcelona-El Prat (BCN)
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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Barcelona-El Prat with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Barcelona-El Prat
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to Barcelona-El PratExplore the most affordable flight options available from St. Louis to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from St. Louis to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:10 pm -
1 stop12h 50m
Wed 10/211:15 pm -
1 stop14h 05m
Deal found 9/10![Multiple Airlines logo]()
$551
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2012:10 pm -
1 stop12h 50m
Wed 9/3012:15 pm -
1 stop13h 26m
Deal found 9/10![United Airlines logo]()
$567
This Justfly.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:10 pm -
1 stop12h 50m
Thu 10/81:15 pm -
1 stop31h 45m
Deal found 9/10![Air Canada logo]()
$572
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/289:30 am -
1 stop16h 30m
Wed 10/712:00 pm -
1 stop16h 09m
Deal found 9/10![United Airlines logo]()
$575
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/292:40 pm -
1 stop11h 40m
Thu 10/81:15 pm -
1 stop14h 05m
Deal found 9/10![United Airlines logo]()
$577
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:05 am -
2 stops18h 30m
Wed 10/73:15 pm -
2 stops25h 34m
Deal found 9/10![Delta logo]()
$580
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:25 pm -
1 stop11h 10m
Wed 10/710:45 am -
1 stop16h 03m
Deal found 9/10![British Airways logo]()
$581
This Gotogate deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:00 am -
2 stops17h 00m
Wed 10/219:40 am -
2 stops16h 01m
Deal found 9/10![Air Canada logo]()
$584
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/207:00 am -
1 stop22h 50m
Wed 9/303:15 pm -
2 stops25h 14m
Deal found 9/10![Delta logo]()
$585
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/272:30 pm -
2 stops19h 40m
Thu 10/811:00 am -
1 stop17h 23m
Deal found 9/10![Delta logo]()
$594
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:45 pm -
2 stops17h 05m
Thu 10/111:00 am -
1 stop13h 45m
Deal found 9/10![Delta logo]()
$606
Best flights from St. Louis to Barcelona-El PratDiscover carefully curated flight deals from St. Louis to Barcelona-El Prat that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from St. Louis to Barcelona-El Prat that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:35 am -
2 stops16h 40m
Wed 10/149:20 am -
2 stops18h 31m
Deal found 9/9![Delta logo]()
$633
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:28 pm -
1 stop13h 32m
Thu 10/112:00 pm -
1 stop16h 09m
Deal found 9/10![United Airlines logo]()
$641
This Justfly.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/31:40 pm -
2 stops17h 05m
Fri 2/1212:00 pm -
1 stop17h 58m
Deal found 9/8![British Airways logo]()
$728
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:10 pm -
1 stop12h 50m
Mon 10/51:50 pm -
1 stop30h 35m
Deal found 9/10![United Airlines logo]()
$719
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm -
2 stops16h 30m
Tue 10/271:10 pm -
2 stops25h 59m
Deal found 9/5![Delta logo]()
$740
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:30 am -
2 stops15h 30m
Wed 10/283:10 pm -
1 stop14h 14m
Deal found 9/6![United Airlines logo]()
$725
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/16:30 am -
2 stops20h 05m
Thu 3/41:35 pm -
2 stops35h 31m
Deal found 9/9![United Airlines logo]()
$757
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:59 pm -
2 stops13h 51m
Sun 9/2712:20 pm -
2 stops17h 56m
Deal found 9/9![Delta logo]()
$897
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:11 pm -
2 stops16h 14m
Fri 10/163:15 pm -
2 stops24h 33m
Deal found 9/7![United Airlines logo]()
$789
This United Airlines deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:11 pm -
2 stops16h 14m
Thu 10/1512:00 pm -
3 stops31h 13m
Deal found 9/8![United Airlines logo]()
$819
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2012:10 pm -
1 stop12h 50m
Sun 9/2711:15 am -
2 stops31h 58m
Deal found 9/7![United Airlines logo]()
$1,010
Last-minute flights from St. Louis to Barcelona-El PratDiscover last-minute flight deals from St. Louis to Barcelona-El Prat. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Barcelona-El Prat. Data last updated September 10, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2012:10 pm -
1 stop12h 50m
Wed 9/3012:15 pm -
1 stop13h 26m
Deal found 9/10![United Airlines logo]()
$567
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/207:00 am -
1 stop22h 50m
Wed 9/303:15 pm -
2 stops25h 14m
Deal found 9/10![Delta logo]()
$585
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:45 pm -
2 stops17h 05m
Thu 10/111:00 am -
1 stop13h 45m
Deal found 9/10![Delta logo]()
$606
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/272:30 pm -
2 stops19h 40m
Thu 10/811:00 am -
1 stop17h 23m
Deal found 9/10![Delta logo]()
$594
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2812:00 pm -
1 stop17h 50m
Thu 10/811:00 am -
1 stop17h 23m
Deal found 9/10![Delta logo]()
$575
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:05 am -
2 stops18h 30m
Wed 10/73:15 pm -
2 stops25h 34m
Deal found 9/10![Delta logo]()
$580
This Justfly.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:10 pm -
1 stop12h 50m
Thu 10/81:15 pm -
1 stop31h 45m
Deal found 9/10![Air Canada logo]()
$572
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/292:40 pm -
1 stop11h 40m
Thu 10/81:15 pm -
1 stop14h 05m
Deal found 9/10![United Airlines logo]()
$577
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/291:25 pm -
1 stop11h 10m
Wed 10/710:45 am -
1 stop16h 03m
Deal found 9/10![British Airways logo]()
$581
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1212:10 pm -
1 stop12h 50m
Wed 10/211:15 pm -
1 stop14h 05m
Deal found 9/10![Multiple Airlines logo]()
$551
This Gotogate deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:00 am -
2 stops17h 00m
Wed 10/219:40 am -
2 stops16h 01m
Deal found 9/10![Air Canada logo]()
$584
One-way flights from St. Louis to Barcelona-El PratSearch for one-way flight options from St. Louis to Barcelona-El Prat. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from St. Louis to Barcelona-El Prat. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/84:30 pm -
2 stops43h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:35 pm -
3 stops38h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/174:30 pm -
2 stops37h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:05 pm -
2 stops40h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$357
This Air Canada deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/95:28 pm -
2 stops33h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Air Canada logo]()
$366
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/95:20 pm -
1 stop32h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![United Airlines logo]()
$374
This Expedia deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/110:00 am -
2 stops20h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Iberia logo]()
$398
This Justfly.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2610:12 am -
2 stops18h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Iberia logo]()
$407
This TravelUp deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/18:22 am -
1 stop17h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Lufthansa logo]()
$410
Find flight deals from St. Louis to Barcelona-El Prat
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) 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 September 10, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $560 (United Airlines) |
One-way from | $324 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $887 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis 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 7,457,451 searches. Data last updated September 10, 2026.
Use the filters below to find and compare flights from St. Louis to Barcelona-El Prat Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Fri 10/9
6:35 pm-4:00 pm
3 stops38h 25m
Barcelona-El Prat
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$326
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Sat 1/9
5:28 pm-9:35 am
2 stops33h 07m
Barcelona-El Prat
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$366
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Sat 1/9
5:20 pm-8:20 am
1 stop32h 00m
Barcelona-El Prat
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$374
Quickest round-trip
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Fri 1/1
8:22 am-9:00 am
1 stop17h 38m
Barcelona-El Prat
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$410
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Fri 2/26
6:30 am-8:20 am
1 stop18h 50m
Barcelona-El Prat
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$412
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Fri 1/1
6:04 am-9:35 am
3 stops20h 31m
Barcelona-El Prat
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$416
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Wed 10/28
10:35 am-11:10 am
2 stops18h 35m
Barcelona-El Prat
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$468
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Sat 10/17
4:50 pm-9:00 am
1 stop33h 10m
Barcelona-El Prat
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$476
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Wed 10/7
10:35 am-10:15 am
2 stops16h 40m
Barcelona-El Prat
Wed 10/14
9:20 am-8:51 pm
2 stops18h 31m
$633
St. LouisBarcelona
STL Lambert-St Louis - BCN Barcelona-El Prat
STLBCN
Lambert-St Louis
Wed 9/23
12:28 pm-9:00 am
1 stop13h 32m
Barcelona-El Prat
Thu 10/1
12:00 pm-9:09 pm
1 stop16h 09m
$641
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Barcelona-El Prat
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Barcelona-El Prat in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Barcelona-El Prat Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on St. Louis-Barcelona-El Prat Airport flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from St. Louis-Barcelona-El Prat Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Barcelona-El Prat Airport flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Barcelona-El Prat Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Barcelona-El Prat
Have a flexible travel schedule? Discover the best time to fly to Barcelona-El Prat from St. Louis with our price prediction graph.
STL-BCN
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.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Barcelona-El Prat Airport
How far ahead should I book a flight from St. Louis to Barcelona-El Prat Airport?
The best time to book flights from St. Louis to Barcelona-El Prat Airport is 23 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from St. Louis to Barcelona-El Prat Airport?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of $558). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,461). 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.
How much does it cost to fly round-trip from St. Louis to Barcelona-El Prat Airport?
Airfare is below average for this route at the moment.
St. Louis to Barcelona-El Prat Airport flights typically cost between $750 and $1,056 in October.The cheapest round-trip price found within the last 5 days was $551 on Multiple Airlines (Oct 12-Oct 21).
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 September 10, 2026.
Peruse reviews from past customers who have flown with United Airlines,American Airlines, andAir Canada from St. Louis to Barcelona-El Prat Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Boarding
7.7
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Boarding
7.7
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Boarding
7.7
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Boarding
7.7
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Boarding
7.7
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Comfort
7.3
Overall
7.4
Entertainment
7.1
Crew
8.1
Boarding
7.7
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Related info for your journey
Find useful and relevant information for your journey from St. Louis 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.
Traveling to a place near Barcelona-El Prat Airport?
Book flights to Barcelona-El Prat Airport if you plan to visit one of these locationsRoses
Calella
Badalona
L'Hospitalet de Llobregat
El Prat de Llobregat
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St. Louis and Barcelona-El Prat flights
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Top 7 airlines flying from St. Louis to Barcelona-El Prat
Discover the top 7 airlines that operate flights from St. Louis 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$510 | Average$1,038 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$540 | Average$962 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$552 | Average$777 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$624 | Average$1,133 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$629 | Average$981 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$654 | Average$1,049 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$732 | Average$945 | FlexibilityNo cancel fee | On-time77% |