$312+ 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 7/31. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Aug 8 — Aug 151
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 July 9, 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 July 9, 2026.
This TravelUp deal was found by Cheapflights users on 7/4. 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.
Tue 11/36:00 am
STL
- BCN
1 stop20h 10m
Multiple Airlines
Wed 2/39:45 am
BCN
- STL
2 stops15h 49m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$742
This United Airlines deal was found by Cheapflights users on 7/4. 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 11/87:30 am
STL
- BCN
1 stop17h 50m
United Airlines
Wed 2/101:35 pm
BCN
- STL
2 stops29h 31m
United Airlines
Deal found 7/4![United Airlines logo]()
$753
This United deal was found by Cheapflights users on 7/6. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/307:33 am
STL
- BCN
2 stops19h 02m
Multiple Airlines
Wed 1/131:35 pm
BCN
- STL
2 stops31h 55m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$756
This United Airlines deal was found by Cheapflights users on 7/4. 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 11/74:56 pm
STL
- BCN
1 stop32h 24m
United Airlines
Wed 2/101:35 pm
BCN
- STL
2 stops29h 31m
United Airlines
Deal found 7/4![United Airlines logo]()
$758
This oojo deal was found by Cheapflights users on 7/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/71:29 pm
STL
- BCN
2 stops16h 11m
Lufthansa
Sun 10/186:40 am
BCN
- STL
1 stop13h 45m
Lufthansa
Deal found 7/5![Lufthansa logo]()
$759
This oojo deal was found by Cheapflights users on 7/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:04 pm
STL
- BCN
2 stops15h 31m
Lufthansa
Wed 11/116:50 am
BCN
- STL
1 stop13h 55m
Lufthansa
Deal found 7/6![Lufthansa logo]()
$761
This United Airlines deal was found by Cheapflights users on 7/4. 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 11/11:08 pm
STL
- BCN
1 stop17h 07m
United Airlines
Wed 2/36:50 am
BCN
- STL
1 stop13h 55m
United Airlines
Deal found 7/4![United Airlines logo]()
$764
This Delta deal was found by Cheapflights users on 7/4. 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 11/310:02 am
STL
- BCN
2 stops15h 33m
Delta
Wed 2/310:30 am
BCN
- STL
2 stops20h 09m
Delta
Deal found 7/4![Delta logo]()
$766
This United Airlines deal was found by Cheapflights users on 7/4. 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 11/1512:05 pm
STL
- BCN
1 stop13h 15m
United Airlines
Fri 2/196:50 am
BCN
- STL
1 stop13h 55m
United Airlines
Deal found 7/4![United Airlines logo]()
$767
This KLM deal was found by Cheapflights users on 7/4. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:00 pm
STL
- BCN
2 stops14h 10m
Multiple Airlines
Wed 2/31:15 pm
BCN
- STL
1 stop14h 34m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$769
This KLM deal was found by Cheapflights users on 7/4. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:51 am
STL
- BCN
2 stops13h 44m
KLM
Thu 2/1811:15 am
BCN
- STL
2 stops16h 22m
KLM
Deal found 7/4![KLM logo]()
$770
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 July 9, 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 July 9, 2026.
This United Airlines deal was found by Cheapflights users on 7/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:00 am
STL
- BCN
3 stops18h 00m
United Airlines
Mon 10/51:25 pm
BCN
- STL
2 stops35h 51m
United Airlines
Deal found 7/5![United Airlines logo]()
$821
This United Airlines deal was found by Cheapflights users on 7/4. 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.
Thu 11/196:00 am
STL
- BCN
1 stop19h 20m
United Airlines
Tue 2/1611:00 am
BCN
- STL
1 stop15h 40m
United Airlines
Deal found 7/4![United Airlines logo]()
$823
This United Airlines deal was found by Cheapflights users on 7/7. 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 9/206:00 am
STL
- BCN
1 stop24h 15m
United Airlines
Sun 9/271:15 pm
BCN
- STL
1 stop31h 45m
United Airlines
Deal found 7/7![United Airlines logo]()
$838
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Tue 8/119:00 am
STL
- BCN
2 stops16h 00m
United Airlines
Thu 8/206:40 am
BCN
- STL
2 stops19h 02m
United Airlines
Deal found 7/7![United Airlines logo]()
$889
This Icelandair deal was found by Cheapflights users on 7/9. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/288:30 am
STL
- BCN
3 stops23h 15m
Multiple Airlines
Sat 9/53:45 pm
BCN
- STL
2 stops47h 00m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$2,573
This United Airlines deal was found by Cheapflights users on 7/8. 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 9/44:50 pm
STL
- BCN
2 stops32h 10m
United Airlines
Sat 9/126:40 am
BCN
- STL
2 stops19h 47m
United Airlines
Deal found 7/8![United Airlines logo]()
$1,013
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Sat 11/217:04 pm
STL
- BCN
2 stops31h 31m
United Airlines
Sat 11/283:10 pm
BCN
- STL
1 stop13h 03m
United Airlines
Deal found 7/7![United Airlines logo]()
$1,032
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Wed 7/296:01 am
STL
- BCN
2 stops25h 19m
United Airlines
Fri 8/1412:15 pm
BCN
- STL
2 stops30h 42m
United Airlines
Deal found 7/7![United Airlines logo]()
$1,210
This United Airlines deal was found by Cheapflights users on 7/4. 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 7/2112:10 pm
STL
- BCN
1 stop12h 50m
United Airlines
Mon 8/33:15 pm
BCN
- STL
1 stop13h 11m
United Airlines
Deal found 7/4![United Airlines logo]()
$1,396
This Icelandair deal was found by Cheapflights users on 7/5. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:30 am
STL
- BCN
3 stops23h 15m
Multiple Airlines
Wed 9/303:45 pm
BCN
- STL
2 stops48h 45m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$3,898
This Icelandair deal was found by Cheapflights users on 7/9. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/249:55 am
STL
- BCN
3 stops21h 50m
Multiple Airlines
Wed 8/53:45 pm
BCN
- STL
3 stops30h 25m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$3,944
Last-minute flights from St. Louis to BarcelonaDiscover last-minute flight deals from St. Louis to Barcelona. Data last updated July 9, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Barcelona. Data last updated July 9, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 7/6. 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.
Sat 8/85:59 pm
STL
- BCN
2 stops55h 01m
Air Canada
Tue 8/181:15 pm
BCN
- STL
2 stops29h 47m
Air Canada
Deal found 7/6![Air Canada logo]()
$882
This CheapOair deal was found by Cheapflights users on 7/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/82:40 pm
STL
- BCN
2 stops34h 20m
Multiple Airlines
Tue 8/181:15 pm
BCN
- STL
1 stop14h 09m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$893
This Booking.com deal was found by Cheapflights users on 7/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:10 pm
STL
- BCN
1 stop12h 50m
Multiple Airlines
Thu 8/201:15 pm
BCN
- STL
1 stop31h 47m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$862
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Tue 8/1112:10 pm
STL
- BCN
1 stop12h 50m
United Airlines
Thu 8/2012:15 pm
BCN
- STL
2 stops42h 23m
United Airlines
Deal found 7/7![United Airlines logo]()
$867
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Tue 8/115:30 pm
STL
- BCN
1 stop12h 45m
United Airlines
Tue 8/181:15 pm
BCN
- STL
2 stops33h 23m
United Airlines
Deal found 7/6![United Airlines logo]()
$873
This Mytrip deal was found by Cheapflights users on 7/4. 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.
Tue 8/1110:53 am
STL
- BCN
2 stops14h 07m
Air Canada
Tue 8/186:40 am
BCN
- STL
2 stops20h 44m
Air Canada
Deal found 7/4![Air Canada logo]()
$892
This United Airlines deal was found by Cheapflights users on 7/4. 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 8/185:30 pm
STL
- BCN
2 stops32h 50m
United Airlines
Wed 9/212:15 pm
BCN
- STL
2 stops30h 02m
United Airlines
Deal found 7/4![United Airlines logo]()
$872
This lol.travel deal was found by Cheapflights users on 7/8. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3112:10 pm
STL
- BCN
1 stop12h 50m
Air Canada
Tue 9/1512:15 pm
BCN
- STL
1 stop13h 26m
Air Canada
Deal found 7/8![Air Canada logo]()
$823
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 July 9, 2026.
Search for one-way flight options from St. Louis to Barcelona. Find affordable one-way fares based on user searches. Data last updated July 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 7/314:57 pm
STL
- BCN
3 stops49h 23m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$312
This Kiwi.com deal was found by Cheapflights users on 7/6. 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.
Mon 10/1210:35 am
STL
- BCN
3 stops43h 15m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$349
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:47 pm
STL
- BCN
1 stop14h 03m
Finnair
Deal found 7/8![Finnair logo]()
$359
This Justfly.com deal was found by Cheapflights users on 7/8. 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 10/287:10 pm
STL
- BCN
2 stops18h 35m
British Airways
Deal found 7/8![British Airways logo]()
$360
This American Airlines deal was found by Cheapflights users on 7/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:40 am
STL
- BCN
1 stop19h 55m
American Airlines
Deal found 7/7![American Airlines logo]()
$362
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Wed 10/286:00 am
STL
- BCN
3 stops20h 35m
United Airlines
Deal found 7/8![United Airlines logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 7/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:58 pm
STL
- BCN
3 stops46h 17m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 7/4. 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.
Mon 8/316:17 pm
STL
- BCN
3 stops42h 53m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$402
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 July 9, 2026.
Round-trip from | $742 (TravelUp) |
|---|---|
One-way from | $312 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $1,094 |
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 July 9, 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
Wed 9/23
7:00 am-8:00 am
3 stops18h 00m
Barcelona-El Prat
Mon 10/5
1:25 pm-6:16 pm
2 stops35h 51m
$821
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Thu 11/19
6:00 am-8:20 am
1 stop19h 20m
Barcelona-El Prat
Tue 2/16
11:00 am-7:40 pm
1 stop15h 40m
$823
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Sun 9/20
6:00 am-1:15 pm
1 stop24h 15m
Barcelona-El Prat
Sun 9/27
1:15 pm-2:00 pm
1 stop31h 45m
$838
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Tue 8/11
9:00 am-8:00 am
2 stops16h 00m
Barcelona-El Prat
Thu 8/20
6:40 am-6:42 pm
2 stops19h 02m
$889
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Fri 9/4
4:50 pm-8:00 am
2 stops32h 10m
Barcelona-El Prat
Sat 9/12
6:40 am-7:27 pm
2 stops19h 47m
$1,013
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Sat 11/21
7:04 pm-9:35 am
2 stops31h 31m
Barcelona-El Prat
Sat 11/28
3:10 pm-9:13 pm
1 stop13h 03m
$1,032
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Wed 7/29
6:01 am-2:20 pm
2 stops25h 19m
Barcelona-El Prat
Fri 8/14
12:15 pm-11:57 am
2 stops30h 42m
$1,210
Quickest round-trip
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Tue 7/21
12:10 pm-8:00 am
1 stop12h 50m
Barcelona-El Prat
Mon 8/3
3:15 pm-9:26 pm
1 stop13h 11m
$1,396
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Fri 8/28
8:30 am-2:45 pm
3 stops23h 15m
Barcelona-El Prat
Sat 9/5
3:45 pm-7:45 am
2 stops47h 00m
$2,573
St. LouisBarcelona
STL - BCN
STLBCN
Lambert-St Louis
Thu 9/24
8:30 am-2:45 pm
3 stops23h 15m
Barcelona-El Prat
Wed 9/30
3:45 pm-9:30 am
2 stops48h 45m
$3,898
Showing 1-10 of 19 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
What is the cheapest month to book a flight from St. Louis to Barcelona?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Barcelona (average of $414). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $927). 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?
How far ahead should I book a flight from St. Louis to Barcelona?
To ensure you get the cheapest price possible for a flight from St. Louis to Barcelona, you should look to book at least 53 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.
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 July 9, 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.
Entertainment
7.1
Overall
7.4
Food
6.7
Crew
8.1
Comfort
7.3
Boarding
7.7
Reviews
1 / 20
6.0
GoodROHIT,Jun 2026
IND - EWR
Entertainment
7.1
Overall
7.4
Food
6.7
Crew
8.1
Comfort
7.3
Boarding
7.7
Reviews
1 / 20
6.0
GoodROHIT,Jun 2026
IND - EWR
Entertainment
7.1
Overall
7.4
Food
6.7
Crew
8.1
Comfort
7.3
Boarding
7.7
Reviews
1 / 20
6.0
GoodROHIT,Jun 2026
IND - EWR
Entertainment
7.1
Overall
7.4
Food
6.7
Crew
8.1
Comfort
7.3
Boarding
7.7
Reviews
1 / 20
6.0
GoodROHIT,Jun 2026
IND - EWR
Entertainment
7.1
Overall
7.4
Food
6.7
Crew
8.1
Comfort
7.3
Boarding
7.7
Reviews
1 / 20
6.0
GoodROHIT,Jun 2026
IND - EWR
Entertainment
7.1
Overall
7.4
Food
6.7
Crew
8.1
Comfort
7.3
Boarding
7.7
Reviews
1 / 20
6.0
GoodROHIT,Jun 2026
IND - EWR
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 July 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$510 | Average$985 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$540 | Average$898 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$552 | Average$777 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$560 | Average$1,070 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$618 | Average$969 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$629 | Average$981 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$637 | Average$847 | FlexibilityNo cancel fee | On-time77% |