What airlines fly to Barcelona?

United Airlines, Air Canada and American Airlines are the top three most popular airlines that fly to Barcelona from St. Louis according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Barcelona. Keep in mind that there are 8 different airlines that fly to Barcelona on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Lambert-St Louis to Barcelona?

United Airlines and Air Canada are the most popular carriers operating from Lambert-St Louis to Barcelona

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

Prices for flights from Lambert-St Louis Airport to Barcelona were last updated today.

How many operators does momondo search for flights from Lambert-St Louis Airport to Barcelona?

As of January 2026, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Barcelona.

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

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 Lambert-St Louis Airport to Barcelona.

What documentation or ID do you need to fly to Barcelona?

The necessary travel and health documents for your Barcelona trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$255 Cheap Flights from St. Louis to Barcelona in 2026

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Find the cheapest flights from St. Louis to Barcelona

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:46 am - 8:50 am

STL

BCN

14h 04m

1 stop

3:05 pm - 11:56 pm

BCN

STL

15h 51m

1 stop

$419Finnair

Wed, Feb 18 - Wed, Feb 25

2:19 pm - 1:40 pm

STL

BCN

16h 21m

2 stops

10:40 am - 7:29 pm

BCN

STL

15h 49m

1 stop

$422British Airways

Wed, Feb 18 - Wed, Feb 25

2:29 pm - 4:25 pm

STL

BCN

18h 56m

2 stops

8:35 pm - 7:30 pm

BCN

STL

29h 55m

1 stop

$429British Airways

Mon, Apr 13 - Mon, Apr 27

2:29 pm - 4:25 pm

STL

BCN

18h 56m

2 stops

9:20 pm - 5:03 pm

BCN

STL

26h 43m

2 stops

$432British Airways

Mon, Apr 13 - Mon, Apr 27

11:59 am - 11:55 am

STL

BCN

17h 56m

1 stop

6:30 pm - 10:53 am

BCN

STL

23h 23m

1 stop

$435Multiple Airlines

Tue, Mar 24 - Thu, Apr 9

3:38 pm - 7:35 am

STL

BCN

32h 57m

1 stop

10:45 am - 7:30 pm

BCN

STL

15h 45m

1 stop

$437British Airways

Sat, Apr 11 - Tue, Apr 21

7:05 am - 10:35 am

STL

BCN

20h 30m

1 stop

7:20 pm - 7:30 pm

BCN

STL

31h 10m

1 stop

$438British Airways

Mon, Apr 13 - Mon, Apr 27

11:59 am - 11:55 am

STL

BCN

17h 56m

1 stop

10:05 am - 10:14 pm

BCN

STL

19h 09m

2 stops

$440Multiple Airlines

Tue, Mar 24 - Thu, Apr 9

7:05 am - 10:35 am

STL

BCN

20h 30m

1 stop

9:20 pm - 7:30 pm

BCN

STL

29h 10m

1 stop

$441British Airways

Mon, Apr 13 - Mon, Apr 27

5:20 pm - 8:50 am

STL

BCN

32h 30m

1 stop

12:15 pm - 11:48 pm

BCN

STL

18h 33m

2 stops

$447British Airways

Sun, Feb 1 - Tue, Feb 17

Air Canada flights from St. Louis to Barcelona

Our best Air Canada deals on St. Louis to Barcelona flight tickets

Air Canada

Apr 11

STL4:05 pmLambert-St Louis

56h 55m

2 stops

BCN8:00 amBarcelona-El Prat

Apr 21

BCN12:15 pmBarcelona-El Prat

15h 53m

2 stops

STL9:08 pmLambert-St Louis

$466

Air Canada

May 9

STL6:49 pmLambert-St Louis

30h 11m

2 stops

BCN8:00 amBarcelona-El Prat

May 20

BCN6:40 amBarcelona-El Prat

20h 25m

2 stops

STL8:05 pmLambert-St Louis

$579

Air Canada

Mar 7

STL4:05 pmLambert-St Louis

34h 00m

2 stops

BCN9:05 amBarcelona-El Prat

Mar 15

BCN6:50 amBarcelona-El Prat

38h 39m

2 stops

STL3:29 pmLambert-St Louis

$599

American Airlines flights from St. Louis to Barcelona

Our best American Airlines deals on St. Louis to Barcelona flight tickets

American Airlines

Jan 31

STL12:06 pmLambert-St Louis

16h 49m

1 stop

BCN11:55 amBarcelona-El Prat

Feb 13

BCN11:00 amBarcelona-El Prat

19h 56m

1 stop

STL11:56 pmLambert-St Louis

$548

American Airlines

Mar 16

STL3:49 pmLambert-St Louis

14h 06m

2 stops

BCN11:55 amBarcelona-El Prat

Mar 23

BCN6:10 pmBarcelona-El Prat

23h 19m

1 stop

STL11:29 amLambert-St Louis

$564

American Airlines

Feb 26

STL2:19 pmLambert-St Louis

14h 26m

2 stops

BCN11:45 amBarcelona-El Prat

Mar 8

BCN6:40 amBarcelona-El Prat

17h 20m

2 stops

STL5:00 pmLambert-St Louis

$565

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 2/18

11:46 am-8:50 am

1 stop14h 04m

Barcelona-El Prat

Wed 2/25

3:05 pm-11:56 pm

1 stop15h 51m

$419

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 2/18

2:19 pm-1:40 pm

2 stops16h 21m

Barcelona-El Prat

Wed 2/25

10:40 am-7:29 pm

1 stop15h 49m

$422

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

2:29 pm-4:25 pm

2 stops18h 56m

Barcelona-El Prat

Mon 4/27

8:35 pm-7:30 pm

1 stop29h 55m

$429

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

2:29 pm-4:25 pm

2 stops18h 56m

Barcelona-El Prat

Mon 4/27

9:20 pm-5:03 pm

2 stops26h 43m

$432

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 3/24

11:59 am-11:55 am

1 stop17h 56m

Barcelona-El Prat

Thu 4/9

6:30 pm-10:53 am

1 stop23h 23m

$435

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 4/11

3:38 pm-7:35 am

1 stop32h 57m

Barcelona-El Prat

Tue 4/21

10:45 am-7:30 pm

1 stop15h 45m

$437

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

7:05 am-10:35 am

1 stop20h 30m

Barcelona-El Prat

Mon 4/27

7:20 pm-7:30 pm

1 stop31h 10m

$438

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 3/24

11:59 am-11:55 am

1 stop17h 56m

Barcelona-El Prat

Thu 4/9

10:05 am-10:14 pm

2 stops19h 09m

$440

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

7:05 am-10:35 am

1 stop20h 30m

Barcelona-El Prat

Mon 4/27

9:20 pm-7:30 pm

1 stop29h 10m

$441

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

5:20 pm-8:50 am

1 stop32h 30m

Barcelona-El Prat

Tue 2/17

12:15 pm-11:48 pm

2 stops18h 33m

$447

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Barcelona

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

Prices

Airlines

What is the cheapest month to fly to Barcelona?

The month of January is, on average, the cheapest month to fly to Barcelona from St. Louis, with most prices found around $505. If you don’t want to visit Barcelona in January, then you should wait until February to fly from St. Louis, when ticket prices are also cheap, with an average price of $640.

How far in advance should I book a flight to Barcelona?

You are more likely to see cheaper flights to Barcelona from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona for around $858 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona from St. Louis for as low as $657 on momondo.

Cheap St. Louis to Barcelona flight deals and tips

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

Fastest flight time	12h 00m
Direct flights	None

The fastest flight from St. Louis to Barcelona takes 12h 00m

There are no direct flights from St. Louis to Barcelona. There are no popular flight routes from St. Louis to Barcelona.

Search flight deals

How far is Lambert-St Louis to Barcelona by plane?
The straight-line distance from Lambert-St Louis to Barcelona is 4636.1 mi. In terms of flight time, this usually takes a little over 12h 00m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Barcelona?
Prices for flights from Lambert-St Louis Airport to Barcelona were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to Barcelona?
As of January 2026, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Barcelona.
How old do you have to be to fly from Lambert-St Louis Airport to Barcelona?
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 Lambert-St Louis Airport to Barcelona.
What documentation or ID do you need to fly to Barcelona?
The necessary travel and health documents for your Barcelona trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Barcelona

Compare and see reviews for airlines that fly from St. Louis to Barcelona with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $540	Free Cancellation	Rating 6.7 7,690 reviews	Search British Airways flights
United Airlines	PriceFrom $567	Free Cancellation	Rating 7.4 9,184 reviews	Search United Airlines flights
Lufthansa	PriceFrom $568	Free Cancellation	Rating 6.8 7,732 reviews	Search Lufthansa flights
Delta	PriceFrom $585	Free Cancellation	Rating 7.9 8,080 reviews	Search Delta flights
KLM	PriceFrom $590	Free Cancellation	Rating 7.7 1,442 reviews	Search KLM flights
Air Canada	PriceFrom $624	Free Cancellation	Rating 7.1 10,637 reviews	Search Air Canada flights
Iberia	PriceFrom $631	Free Cancellation	Rating 7.0 3,093 reviews	Search Iberia flights
American Airlines	PriceFrom $632	Free Cancellation	Rating 7.2 11,164 reviews	Search American Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Barcelona. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for St. Louis to Barcelona flights to just show those with flexible booking policies.

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

Once all potential St. Louis to Barcelona flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from St. Louis to Barcelona now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Barcelona and let you know when they change.