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Cheap flights from Barcelona-El Prat Airport to St. Louis from $408

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 9/3. 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

United Airlines Logo
6:50 am - 8:46 pmBCN-STL
20h 56m2 stops
United Airlines Logo
5:30 pm - 7:50 amSTL-BCN
31h 20m2 stops
$770United Airlines
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Thu, Aug 28 - Mon, Sep 1
British Airways Logo
12:20 pm - 8:23 pmBCN-STL
15h 03m1 stop
British Airways Logo
1:42 pm - 12:05 pmSTL-BCN
15h 23m2 stops
$780British Airways
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Thu, Aug 28 - Mon, Sep 1
Logo
11:00 am - 10:32 pmBCN-STL
18h 32m1 stop
Logo
5:21 am - 7:05 amSTL-BCN
18h 44m1 stop
$793
Find Deal
Wed, Nov 12 - Mon, Nov 17
Iberia Logo
2:00 pm - 8:47 pmBCN-STL
13h 47m1 stop
Iberia Logo
1:15 pm - 9:05 amSTL-BCN
12h 50m1 stop
$798Iberia
Find Deal
Thu, Aug 28 - Mon, Sep 1
Logo
11:00 am - 10:32 pmBCN-STL
18h 32m1 stop
Logo
10:45 am - 9:00 amSTL-BCN
15h 15m1 stop
$803
Find Deal
Wed, Nov 12 - Mon, Nov 17
Air Canada Logo
6:50 am - 7:38 pmBCN-STL
19h 48m2 stops
Air Canada Logo
1:30 pm - 11:55 amSTL-BCN
15h 25m2 stops
$813Air Canada
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Sun, Sep 14 - Sat, Sep 20
American Airlines Logo
1:30 pm - 11:59 pmBCN-STL
17h 29m1 stop
American Airlines Logo
7:16 am - 10:10 amSTL-BCN
19h 54m1 stop
$843American Airlines
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Sat, Sep 13 - Sat, Sep 20
Air Canada Logo
6:50 am - 3:21 pmBCN-STL
15h 31m2 stops
Air Canada Logo
4:05 pm - 10:45 amSTL-BCN
35h 40m2 stops
$997Air Canada
Find Deal
Fri, Aug 22 - Sat, Dec 13
American Airlines Logo
10:45 am - 8:18 pmBCN-STL
16h 33m1 stop
American Airlines Logo
4:35 pm - 7:05 amSTL-BCN
31h 30m1 stop
$1,035American Airlines
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Fri, Aug 22 - Sat, Dec 13
Iberia Logo
9:15 am - 7:09 pmBCN-STL
16h 54m2 stops
Iberia Logo
7:59 pm - 5:40 pmSTL-BCN
14h 41m2 stops
$1,087Iberia
Find Deal
Thu, Aug 28 - Mon, Sep 1

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
Aug 28
BCN2:00 pmBarcelona-El Prat
13h 47m
1 stop
STL8:47 pmLambert-St Louis
Sep 1
STL1:15 pmLambert-St Louis
12h 50m
1 stop
BCN9:05 amBarcelona-El Prat
$798
Find similar
Iberia
Aug 28
BCN9:15 amBarcelona-El Prat
16h 54m
2 stops
STL7:09 pmLambert-St Louis
Sep 1
STL7:59 pmLambert-St Louis
14h 41m
2 stops
BCN5:40 pmBarcelona-El Prat
$1,087
Find similar

British Airways flights from Barcelona-El Prat Airport to St. Louis

Our best British Airways deals on Barcelona-El Prat Airport to St. Louis flight tickets
British Airways
Aug 28
BCN12:20 pmBarcelona-El Prat
15h 03m
1 stop
STL8:23 pmLambert-St Louis
Sep 1
STL1:42 pmLambert-St Louis
15h 23m
2 stops
BCN12:05 pmBarcelona-El Prat
$780
Find similar
British Airways
Nov 12
BCN12:30 pmBarcelona-El Prat
15h 25m
1 stop
STL8:55 pmLambert-St Louis
Nov 17
STL3:23 pmLambert-St Louis
15h 17m
2 stops
BCN1:40 pmBarcelona-El Prat
$781
Find similar
British Airways
Aug 28
BCN10:45 amBarcelona-El Prat
33h 27m
1 stop
STL1:12 pmLambert-St Louis
Sep 1
STL7:59 pmLambert-St Louis
14h 41m
2 stops
BCN5:40 pmBarcelona-El Prat
$786
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 July 31, 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 8/28

6:50 am-8:46 pm

2 stops20h 56m

Lambert-St Louis

Mon 9/1

5:30 pm-7:50 am

2 stops31h 20m

$770

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 8/28

12:20 pm-8:23 pm

1 stop15h 03m

Lambert-St Louis

Mon 9/1

1:42 pm-12:05 pm

2 stops15h 23m

$780

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/12

11:00 am-10:32 pm

1 stop18h 32m

Lambert-St Louis

Mon 11/17

5:21 am-7:05 am

1 stop18h 44m

$793

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 8/28

2:00 pm-8:47 pm

1 stop13h 47m

Lambert-St Louis

Mon 9/1

1:15 pm-9:05 am

1 stop12h 50m

$798

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/12

11:00 am-10:32 pm

1 stop18h 32m

Lambert-St Louis

Mon 11/17

10:45 am-9:00 am

1 stop15h 15m

$803

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Sun 9/14

6:50 am-7:38 pm

2 stops19h 48m

Lambert-St Louis

Sat 9/20

1:30 pm-11:55 am

2 stops15h 25m

$813

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Sat 9/13

1:30 pm-11:59 pm

1 stop17h 29m

Lambert-St Louis

Sat 9/20

7:16 am-10:10 am

1 stop19h 54m

$843

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Fri 8/22

6:50 am-3:21 pm

2 stops15h 31m

Lambert-St Louis

Sat 12/13

4:05 pm-10:45 am

2 stops35h 40m

$997

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Fri 8/22

10:45 am-8:18 pm

1 stop16h 33m

Lambert-St Louis

Sat 12/13

4:35 pm-7:05 am

1 stop31h 30m

$1,035

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 8/28

9:15 am-7:09 pm

2 stops16h 54m

Lambert-St Louis

Mon 9/1

7:59 pm-5:40 pm

2 stops14h 41m

$1,087

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, October 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 $693. The month of March is another great option to travel to St. Louis, with average flight prices from Barcelona-El Prat Airport averaging around $720.

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 July 2025, prices for Barcelona-El Prat Airport to St. Louis flights are approximately 2% more expensive 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

Best Price Found

$408

Fastest flight time

13h 17m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Barcelona-El Prat Airport in the past 72 hours is $408. The best round-trip flight deal from Barcelona-El Prat Airport to St. Louis found on momondo in the last 72 hours is $770.
The fastest flight from Barcelona-El Prat Airport to St. Louis takes 13h 17m
There are no direct flights from Barcelona-El Prat Airport to St. Louis. Popular non-direct route for this connection is Barcelona-El Prat Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
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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 13h 17m.

  • 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
Maryland Heights
Florissant
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
Shrewsbury
Grafton

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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