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Cheap flights from Barcelona-El Prat Airport to St. Louis from $401

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Barcelona-El Prat Airport to St. Louis departing on 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Barcelona-El Prat Airport to St. Louis

Cheap round-trip flights

Iberia Logo
10:40 am - 10:24 pmBCN-STL
18h 44m1 stop
Iberia Logo
9:35 am - 8:50 amSTL-BCN
16h 15m1 stop
$680Iberia
Find Deal
Thu, Feb 19 - Mon, Feb 23
Iberia Logo
10:40 am - 10:24 pmBCN-STL
18h 44m1 stop
Iberia Logo
9:35 am - 8:50 amSTL-BCN
16h 15m1 stop
$681Iberia
Find Deal
Thu, Feb 19 - Mon, Feb 23
Multiple Airlines Logo
12:50 pm - 9:00 pmBCN-STL
15h 10m1 stop
Multiple Airlines Logo
5:15 am - 7:05 amSTL-BCN
18h 50m1 stop
$702Multiple Airlines
Find Deal
Wed, Nov 12 - Mon, Nov 17
American Airlines Logo
12:20 pm - 10:34 pmBCN-STL
17h 14m1 stop
American Airlines Logo
10:36 am - 9:05 amSTL-BCN
15h 29m1 stop
$704American Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 22
Multiple Airlines Logo
11:00 am - 10:27 pmBCN-STL
18h 27m1 stop
Multiple Airlines Logo
7:00 am - 7:05 amSTL-BCN
17h 05m2 stops
$709Multiple Airlines
Find Deal
Wed, Nov 12 - Mon, Nov 17
American Airlines Logo
12:20 pm - 8:53 pmBCN-STL
15h 33m1 stop
American Airlines Logo
10:22 am - 6:45 amSTL-BCN
13h 23m2 stops
$717American Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 22
United Airlines Logo
6:50 am - 1:55 pmBCN-STL
14h 05m1 stop
United Airlines Logo
10:00 am - 1:10 pmSTL-BCN
20h 10m1 stop
$788United Airlines
Find Deal
Wed, Nov 19 - Thu, Nov 27
United Airlines Logo
6:50 am - 10:45 pmBCN-STL
22h 55m2 stops
United Airlines Logo
8:25 am - 8:20 amSTL-BCN
16h 55m1 stop
$793United Airlines
Find Deal
Sun, Nov 16 - Sat, Nov 29
Lufthansa Logo
6:50 am - 3:44 pmBCN-STL
15h 54m2 stops
Lufthansa Logo
6:43 pm - 1:05 pmSTL-BCN
12h 22m1 stop
$799Lufthansa
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Wed, Oct 22 - Sat, Nov 1
Lufthansa Logo
3:15 pm - 3:44 pmBCN-STL
31h 29m1 stop
Lufthansa Logo
1:05 pm - 8:20 amSTL-BCN
12h 15m1 stop
$809Lufthansa
Find Deal
Mon, Oct 13 - Wed, Oct 22

Iberia flights from Barcelona-El Prat Airport to St. Louis

Our best Iberia deals on Barcelona-El Prat Airport to St. Louis flight tickets
Iberia
Feb 19
BCN10:40 amBarcelona-El Prat
18h 44m
1 stop
STL10:24 pmLambert-St Louis
Feb 23
STL9:35 amLambert-St Louis
16h 15m
1 stop
BCN8:50 amBarcelona-El Prat
$680
Find similar
Iberia
Feb 19
BCN10:40 amBarcelona-El Prat
18h 44m
1 stop
STL10:24 pmLambert-St Louis
Feb 23
STL9:35 amLambert-St Louis
16h 15m
1 stop
BCN8:50 amBarcelona-El Prat
$681
Find similar
Iberia
Feb 19
BCN10:40 amBarcelona-El Prat
18h 44m
1 stop
STL10:24 pmLambert-St Louis
Feb 23
STL9:25 amLambert-St Louis
21h 15m
2 stops
BCN1:40 pmBarcelona-El Prat
$691
Find similar

United Airlines flights from Barcelona-El Prat Airport to St. Louis

Our best United Airlines deals on Barcelona-El Prat Airport to St. Louis flight tickets
United Airlines
Nov 19
BCN6:50 amBarcelona-El Prat
14h 05m
1 stop
STL1:55 pmLambert-St Louis
Nov 27
STL10:00 amLambert-St Louis
20h 10m
1 stop
BCN1:10 pmBarcelona-El Prat
$788
Find similar
United Airlines
Nov 16
BCN6:50 amBarcelona-El Prat
22h 55m
2 stops
STL10:45 pmLambert-St Louis
Nov 29
STL8:25 amLambert-St Louis
16h 55m
1 stop
BCN8:20 amBarcelona-El Prat
$793
Find similar
United Airlines
Nov 19
BCN6:50 amBarcelona-El Prat
19h 26m
2 stops
STL7:16 pmLambert-St Louis
Nov 26
STL6:43 pmLambert-St Louis
15h 52m
2 stops
BCN5:35 pmBarcelona-El Prat
$798
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Barcelona-El Prat Airport to St. Louis 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, momondo users made 832,500 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Barcelona-El Prat Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 2/19

10:40 am-10:24 pm

1 stop18h 44m

Lambert-St Louis

Mon 2/23

9:35 am-8:50 am

1 stop16h 15m

$680

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 2/19

10:40 am-10:24 pm

1 stop18h 44m

Lambert-St Louis

Mon 2/23

9:35 am-8:50 am

1 stop16h 15m

$681

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/12

12:50 pm-9:00 pm

1 stop15h 10m

Lambert-St Louis

Mon 11/17

5:15 am-7:05 am

1 stop18h 50m

$702

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Tue 10/14

12:20 pm-10:34 pm

1 stop17h 14m

Lambert-St Louis

Wed 10/22

10:36 am-9:05 am

1 stop15h 29m

$704

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/12

11:00 am-10:27 pm

1 stop18h 27m

Lambert-St Louis

Mon 11/17

7:00 am-7:05 am

2 stops17h 05m

$709

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Tue 10/14

12:20 pm-8:53 pm

1 stop15h 33m

Lambert-St Louis

Wed 10/22

10:22 am-6:45 am

2 stops13h 23m

$717

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/19

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Thu 11/27

10:00 am-1:10 pm

1 stop20h 10m

$788

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Sun 11/16

6:50 am-10:45 pm

2 stops22h 55m

Lambert-St Louis

Sat 11/29

8:25 am-8:20 am

1 stop16h 55m

$793

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 10/22

6:50 am-3:44 pm

2 stops15h 54m

Lambert-St Louis

Sat 11/1

6:43 pm-1:05 pm

1 stop12h 22m

$799

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Mon 10/13

3:15 pm-3:44 pm

1 stop31h 29m

Lambert-St Louis

Wed 10/22

1:05 pm-8:20 am

1 stop12h 15m

$809

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Barcelona-El Prat Airport to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, February is the cheapest month to fly from Barcelona-El Prat Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $684. The month of October is another great option to travel to St. Louis, with average flight prices from Barcelona-El Prat Airport averaging around $693.

Can stopping save me money on Barcelona-El Prat Airport to St. Louis flights?

You could potentially save up to 40% on your flight if you consider stops on a Barcelona-El Prat Airport to St. Louis flight.

How have Barcelona-El Prat Airport to St. Louis flight prices changed over time?

As of September 2025, prices for Barcelona-El Prat Airport to St. Louis flights are approximately 15% cheaper when compared to flights at the same time last year.

When to book flights from Barcelona-El Prat Airport to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Barcelona-El Prat Airport to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Barcelona-El Prat Airport to St. Louis (BCN to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Barcelona-El Prat Airport to St. Louis

Direct flights

None
There are no direct flights from Barcelona-El Prat Airport to St. Louis. There are no popular flight routes from Barcelona-El Prat Airport to St. Louis.
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  • How far is Barcelona-El Prat to Lambert-St Louis by plane?

    The distance between Barcelona-El Prat and Lambert-St Louis is about 4635.1 mi. In terms of flight time, this usually takes a little over 14h 05m.

  • When did momondo last update prices for flights from Barcelona-El Prat Airport to Lambert-St Louis Airport?

    Prices for flights from Barcelona-El Prat Airport to Lambert-St Louis Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Barcelona-El Prat Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Barcelona-El Prat Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Barcelona to St. Louis?

It is quick and easy to find Barcelona to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Barcelona to St. Louis with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to St. Louis from Barcelona with this policy.

How can momondo help me find flights from Barcelona to St. Louis?

momondo helps you find the best flight between Barcelona and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Barcelona to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Barcelona and alert you when they change.

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