$532+ Cheap flights from St. Louis (STL) to Barcelona
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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Apr 30 — May 71
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Barcelona 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
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to BarcelonaExplore the most affordable flight options available from St. Louis to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2026.
Explore the most affordable flight options available from St. Louis to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 3/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:35 pm
STL
- BCN
1 stop15h 55m
Multiple Airlines
Fri 10/3010:40 am
BCN
- STL
1 stop15h 06m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$749
This Cheapflightsfares deal was found by Cheapflights users on 3/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:35 pm
STL
- BCN
1 stop15h 55m
British Airways
Tue 10/2010:15 am
BCN
- STL
1 stop16h 15m
British Airways
Deal found 3/26![British Airways logo]()
$760
This Cheapflightsfares deal was found by Cheapflights users on 3/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:49 pm
STL
- BCN
2 stops16h 26m
Lufthansa
Fri 10/306:50 am
BCN
- STL
1 stop14h 05m
Lufthansa
Deal found 3/29![Lufthansa logo]()
$770
This Cheapflightsfares deal was found by Cheapflights users on 3/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:30 pm
STL
- BCN
1 stop17h 45m
Lufthansa
Tue 10/206:40 am
BCN
- STL
2 stops15h 58m
Lufthansa
Deal found 3/26![Lufthansa logo]()
$775
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:27 pm
STL
- BCN
2 stops21h 28m
Lufthansa
Sun 10/186:40 am
BCN
- STL
1 stop13h 45m
Lufthansa
Deal found 3/30![Lufthansa logo]()
$805
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/29:35 pm
STL
- BCN
1 stop15h 40m
British Airways
Tue 10/137:40 am
BCN
- STL
1 stop18h 50m
British Airways
Deal found 3/30![British Airways logo]()
$808
This United Airlines deal was found by Cheapflights users on 3/29. 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 10/208:25 am
STL
- BCN
2 stops16h 35m
United Airlines
Fri 10/3012:35 pm
BCN
- STL
2 stops27h 13m
United Airlines
Deal found 3/29![United Airlines logo]()
$810
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:30 pm
STL
- BCN
1 stop17h 05m
Lufthansa
Sun 9/276:40 am
BCN
- STL
1 stop13h 45m
Lufthansa
Deal found 3/27![Lufthansa logo]()
$812
This oojo deal was found by Cheapflights users on 3/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:35 pm
STL
- BCN
1 stop18h 05m
British Airways
Sat 10/177:20 pm
BCN
- STL
1 stop31h 10m
British Airways
Deal found 3/30![British Airways logo]()
$817
This oojo deal was found by Cheapflights users on 3/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/511:39 am
STL
- BCN
1 stop14h 11m
British Airways
Thu 11/261:30 pm
BCN
- STL
1 stop14h 25m
British Airways
Deal found 3/29![British Airways logo]()
$818
This oojo deal was found by Cheapflights users on 3/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:05 pm
STL
- BCN
2 stops19h 35m
British Airways
Sun 10/187:50 am
BCN
- STL
1 stop18h 40m
British Airways
Deal found 3/30![British Airways logo]()
$820
Best flights from St. Louis to BarcelonaDiscover carefully curated flight deals from St. Louis to Barcelona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 31, 2026.
Discover carefully curated flight deals from St. Louis to Barcelona that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 31, 2026.
This United Airlines deal was found by Cheapflights users on 3/27. 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 4/247:45 am
STL
- BCN
2 stops17h 35m
United Airlines
Fri 5/112:15 pm
BCN
- STL
2 stops38h 12m
United Airlines
Deal found 3/27![United Airlines logo]()
$838
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/161:13 pm
STL
- BCN
2 stops21h 42m
Lufthansa
Sat 7/47:55 am
BCN
- STL
2 stops20h 31m
Lufthansa
Deal found 3/30![Lufthansa logo]()
$1,420
This oojo deal was found by Cheapflights users on 3/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/161:45 pm
STL
- BCN
1 stop14h 10m
British Airways
Sat 7/410:45 am
BCN
- STL
1 stop17h 54m
British Airways
Deal found 3/30![British Airways logo]()
$1,448
This Finnair deal was found by Cheapflights users on 3/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/511:15 am
STL
- BCN
1 stop18h 45m
Multiple Airlines
Sun 6/147:25 pm
BCN
- STL
1 stop20h 44m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$1,515
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/107:45 am
STL
- BCN
2 stops17h 35m
United Airlines
Sun 5/178:00 am
BCN
- STL
2 stops17h 12m
United Airlines
Deal found 3/26![United Airlines logo]()
$985
This United Airlines deal was found by Cheapflights users on 3/26. 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 6/58:15 pm
STL
- BCN
1 stop34h 00m
United Airlines
Sun 6/141:15 pm
BCN
- STL
1 stop29h 51m
United Airlines
Deal found 3/26![United Airlines logo]()
$1,529
This United Airlines deal was found by Cheapflights users on 3/30. 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 6/261:20 pm
STL
- BCN
1 stop11h 40m
United Airlines
Sun 7/510:25 am
BCN
- STL
1 stop34h 00m
United Airlines
Deal found 3/30![United Airlines logo]()
$1,538
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/208:30 am
STL
- BCN
1 stop22h 50m
United Airlines
Wed 5/2711:15 am
BCN
- STL
2 stops15h 08m
United Airlines
Deal found 3/26![United Airlines logo]()
$4,940
This Cathay Pacific deal was found by Cheapflights users on 3/27. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/169:08 am
STL
- BCN
2 stops40h 27m
Multiple Airlines
Sat 7/47:40 am
BCN
- STL
3 stops42h 45m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$12,734
This Cathay Pacific deal was found by Cheapflights users on 3/26. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/185:51 am
STL
- BCN
3 stops47h 54m
Multiple Airlines
Sun 5/241:00 pm
BCN
- STL
2 stops39h 42m
Multiple Airlines
Deal found 3/26![Multiple Airlines logo]()
$12,749
Last-minute flights from St. Louis to BarcelonaDiscover last-minute flight deals from St. Louis to Barcelona. Data last updated March 31, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Barcelona. Data last updated March 31, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/27. 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 4/249:10 am
STL
- BCN
1 stop21h 05m
United Airlines
Fri 5/112:15 pm
BCN
- STL
2 stops38h 12m
United Airlines
Deal found 3/27![United Airlines logo]()
$833
This Finnair deal was found by Cheapflights users on 3/27. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2411:06 am
STL
- BCN
1 stop18h 54m
Multiple Airlines
Fri 5/16:30 pm
BCN
- STL
1 stop23h 43m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$853
This United Airlines deal was found by Cheapflights users on 3/27. 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 4/266:30 am
STL
- BCN
1 stop23h 45m
United Airlines
Sun 5/31:15 pm
BCN
- STL
1 stop29h 51m
United Airlines
Deal found 3/27![United Airlines logo]()
$839
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/269:40 pm
STL
- BCN
1 stop17h 50m
American Airlines
Sun 5/310:30 am
BCN
- STL
1 stop20h 16m
American Airlines
Deal found 3/27![American Airlines logo]()
$845
This British Airways deal was found by Cheapflights users on 3/27. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/262:33 pm
STL
- BCN
2 stops14h 07m
British Airways
Sun 5/310:30 am
BCN
- STL
1 stop20h 16m
British Airways
Deal found 3/27![British Airways logo]()
$851
This Ticket deal was found by Cheapflights users on 3/27. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/264:41 pm
STL
- BCN
1 stop13h 09m
Virgin Atlantic
Tue 5/123:15 pm
BCN
- STL
2 stops15h 44m
Virgin Atlantic
Deal found 3/27![Virgin Atlantic logo]()
$863
This Ticket deal was found by Cheapflights users on 3/27. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/269:59 am
STL
- BCN
1 stop19h 51m
Multiple Airlines
Tue 5/1210:55 am
BCN
- STL
1 stop13h 10m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$887
This Gotogate deal was found by Cheapflights users on 3/28. 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.
Sun 4/264:05 pm
STL
- BCN
2 stops32h 55m
Air Canada
Tue 5/1212:15 pm
BCN
- STL
1 stop15h 10m
Air Canada
Deal found 3/28![Air Canada logo]()
$889
One-way flights from St. Louis to BarcelonaSearch for one-way flight options from St. Louis to Barcelona. Find affordable one-way fares based on user searches. Data last updated March 31, 2026.
Search for one-way flight options from St. Louis to Barcelona. Find affordable one-way fares based on user searches. Data last updated March 31, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 5/155:27 pm
STL
- BCN
2 stops35h 43m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$532
This Ovago deal was found by Cheapflights users on 3/26. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2410:19 am
STL
- BCN
2 stops16h 46m
WestJet
Deal found 3/26![WestJet logo]()
$613
This oojo deal was found by Cheapflights users on 3/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/287:52 pm
STL
- BCN
2 stops17h 28m
British Airways
Deal found 3/30![British Airways logo]()
$626
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 5/225:27 pm
STL
- BCN
2 stops35h 43m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$629
This Cheapflightsfares deal was found by Cheapflights users on 3/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/285:00 pm
STL
- BCN
1 stop10h 55m
Finnair
Deal found 3/26![Finnair logo]()
$630
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 5/236:45 am
STL
- BCN
3 stops35h 25m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$692
This Cheapflightsfares deal was found by Cheapflights users on 3/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:09 pm
STL
- BCN
2 stops20h 16m
Lufthansa
Deal found 3/27![Lufthansa logo]()
$698
Find flight deals from St. Louis to Barcelona
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Barcelona (S37). 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 March 31, 2026.
Round-trip from | $812 (Cheapflightsfares) |
|---|---|
One-way from | $532 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $1,020 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Barcelona 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 2,558,603 searches. Data last updated March 31, 2026.
Use the filters below to find and compare flights from St. Louis to Barcelona that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Fri 4/24
7:45 am-8:20 am
2 stops17h 35m
Barcelona-El Prat
Fri 5/1
12:15 pm-7:27 pm
2 stops38h 12m
$838
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Sun 5/10
7:45 am-8:20 am
2 stops17h 35m
Barcelona-El Prat
Sun 5/17
8:00 am-6:12 pm
2 stops17h 12m
$985
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Tue 6/16
1:13 pm-5:55 pm
2 stops21h 42m
Barcelona-El Prat
Sat 7/4
7:55 am-9:26 pm
2 stops20h 31m
$1,420
Quickest round-trip
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Tue 6/16
1:45 pm-10:55 am
1 stop14h 10m
Barcelona-El Prat
Sat 7/4
10:45 am-9:39 pm
1 stop17h 54m
$1,448
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Fri 6/5
11:15 am-1:00 pm
1 stop18h 45m
Barcelona-El Prat
Sun 6/14
7:25 pm-9:09 am
1 stop20h 44m
$1,515
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Fri 6/5
8:15 pm-1:15 pm
1 stop34h 00m
Barcelona-El Prat
Sun 6/14
1:15 pm-12:06 pm
1 stop29h 51m
$1,529
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Fri 6/26
1:20 pm-8:00 am
1 stop11h 40m
Barcelona-El Prat
Sun 7/5
10:25 am-1:25 pm
1 stop34h 00m
$1,538
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Wed 5/20
8:30 am-2:20 pm
1 stop22h 50m
Barcelona-El Prat
Wed 5/27
11:15 am-7:23 pm
2 stops15h 08m
$4,940
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Tue 6/16
9:08 am-8:35 am
2 stops40h 27m
Barcelona-El Prat
Sat 7/4
7:40 am-7:25 pm
3 stops42h 45m
$12,734
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Mon 5/18
5:51 am-12:45 pm
3 stops47h 54m
Barcelona-El Prat
Sun 5/24
1:00 pm-9:42 pm
2 stops39h 42m
$12,749
Showing 1-10 of 20 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Barcelona
Have a flexible travel schedule? Discover the best time to fly to Barcelona from St. Louis with our price prediction graph.
STL-S37
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
STL-S37
STL-BCN
How far ahead should I book a flight from St. Louis to Barcelona?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Barcelona. Price data was last updated on March 13, 2026.
To ensure you get the cheapest price possible for a flight from St. Louis to Barcelona, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from St. Louis to Barcelona?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Barcelona (average of $487). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,072). 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?
Reviews of airlines servicing Barcelona
Get insights into the airlines that provide service to Barcelona. 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. Reviews last updated March 31, 2026.
See what other customers who have flown with United Airlines,American Airlines, andAir Canada from St. Louis to Barcelona have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Crew
8.1
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Crew
8.1
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Crew
8.1
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Crew
8.1
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Crew
8.1
Comfort
7.3
Overall
7.4
Entertainment
7.1
Food
6.6
Boarding
7.7
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Related info for your journey
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Top 7 airlines flying from St. Louis to Barcelona
Discover the top 7 airlines that operate flights from St. Louis to Barcelona. 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 2,558,603 searches. Data last updated March 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$510 | Average$985 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$540 | Average$758 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$552 | Average$777 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$560 | Average$932 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$576 | Average$1,072 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$607 | Average$981 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$631 | Average$766 | FlexibilityNo cancel fee | On-time77% |