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 41% 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?

Lufthansa, 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 December 2025, 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.

$350 Cheap Flights from St. Louis to Barcelona in 2025/26

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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.

12:44 pm - 2:15 pm

STL

BCN

18h 31m2 stops

6:50 am - 1:55 pm

BCN

STL

14h 05m1 stop

$435Multiple Airlines

Sun, Jan 18 - Sun, Jan 25

1:15 pm - 12:00 pm

STL

BCN

15h 45m2 stops

11:00 am - 11:59 pm

BCN

STL

19h 59m1 stop

$436Lufthansa

Mon, Jan 19 - Mon, Jan 26

6:30 am - 9:35 am

STL

BCN

20h 05m2 stops

1:35 pm - 2:30 pm

BCN

STL

31h 55m2 stops

$468Air Canada

Mon, Jan 19 - Mon, Jan 26

4:05 pm - 9:35 am

STL

BCN

34h 30m2 stops

1:35 pm - 9:05 pm

BCN

STL

38h 30m2 stops

$470Air Canada

Sun, Feb 1 - Tue, Feb 17

3:50 pm - 5:45 pm

STL

BCN

18h 55m1 stop

6:50 am - 1:55 pm

BCN

STL

14h 05m1 stop

$473Lufthansa

Fri, Jan 23 - Fri, Jan 30

11:55 am - 8:50 am

STL

BCN

13h 55m1 stop

12:30 pm - 10:44 pm

BCN

STL

17h 14m1 stop

$482British Airways

Mon, Jan 19 - Mon, Jan 26

9:25 am - 8:50 am

STL

BCN

16h 25m1 stop

11:00 am - 10:05 pm

BCN

STL

18h 05m1 stop

$484Multiple Airlines

Sun, Feb 1 - Tue, Feb 17

5:05 am - 7:05 am

STL

BCN

19h 00m1 stop

11:00 am - 11:18 pm

BCN

STL

19h 18m2 stops

$489Multiple Airlines

Sun, Feb 1 - Tue, Feb 17

11:20 am - 9:35 am

STL

BCN

15h 15m2 stops

5:50 am - 9:13 pm

BCN

STL

22h 23m2 stops

$491United Airlines

Wed, Feb 4 - Sun, Feb 8

11:20 am - 9:35 am

STL

BCN

15h 15m2 stops

5:50 am - 10:58 pm

BCN

STL

24h 08m2 stops

$492United Airlines

Wed, Feb 4 - Sun, Feb 8

Lufthansa flights from St. Louis to Barcelona

Our best Lufthansa deals on St. Louis to Barcelona flight tickets

Lufthansa

Jan 19

STL1:15 pmLambert-St Louis

15h 45m

2 stops

BCN12:00 pmBarcelona-El Prat

Jan 26

BCN11:00 amBarcelona-El Prat

19h 59m

1 stop

STL11:59 pmLambert-St Louis

$436

Find similar

Lufthansa

Jan 23

STL3:50 pmLambert-St Louis

18h 55m

1 stop

BCN5:45 pmBarcelona-El Prat

Jan 30

BCN6:50 amBarcelona-El Prat

14h 05m

1 stop

STL1:55 pmLambert-St Louis

$473

Find similar

Lufthansa

Jan 7

STL6:40 pmLambert-St Louis

21h 25m

2 stops

BCN11:05 pmBarcelona-El Prat

Jan 26

BCN11:00 amBarcelona-El Prat

19h 59m

1 stop

STL11:59 pmLambert-St Louis

$655

Find similar

Air Canada flights from St. Louis to Barcelona

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

Air Canada

Jan 19

STL6:30 amLambert-St Louis

20h 05m

2 stops

BCN9:35 amBarcelona-El Prat

Jan 26

BCN1:35 pmBarcelona-El Prat

31h 55m

2 stops

STL2:30 pmLambert-St Louis

$468

Find similar

Air Canada

Feb 1

STL4:05 pmLambert-St Louis

34h 30m

2 stops

BCN9:35 amBarcelona-El Prat

Feb 17

BCN1:35 pmBarcelona-El Prat

38h 30m

2 stops

STL9:05 pmLambert-St Louis

$470

Find similar

Air Canada

Mar 6

STL4:05 pmLambert-St Louis

34h 30m

2 stops

BCN9:35 amBarcelona-El Prat

Mar 26

BCN12:35 pmBarcelona-El Prat

38h 32m

2 stops

STL9:07 pmLambert-St Louis

$520

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 1/18

12:44 pm-2:15 pm

2 stops18h 31m

Barcelona-El Prat

Sun 1/25

6:50 am-1:55 pm

1 stop14h 05m

$435

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 1/19

1:15 pm-12:00 pm

2 stops15h 45m

Barcelona-El Prat

Mon 1/26

11:00 am-11:59 pm

1 stop19h 59m

$436

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 1/19

6:30 am-9:35 am

2 stops20h 05m

Barcelona-El Prat

Mon 1/26

1:35 pm-2:30 pm

2 stops31h 55m

$468

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

4:05 pm-9:35 am

2 stops34h 30m

Barcelona-El Prat

Tue 2/17

1:35 pm-9:05 pm

2 stops38h 30m

$470

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 1/23

3:50 pm-5:45 pm

1 stop18h 55m

Barcelona-El Prat

Fri 1/30

6:50 am-1:55 pm

1 stop14h 05m

$473

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 1/19

11:55 am-8:50 am

1 stop13h 55m

Barcelona-El Prat

Mon 1/26

12:30 pm-10:44 pm

1 stop17h 14m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

9:25 am-8:50 am

1 stop16h 25m

Barcelona-El Prat

Tue 2/17

11:00 am-10:05 pm

1 stop18h 05m

$484

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

5:05 am-7:05 am

1 stop19h 00m

Barcelona-El Prat

Tue 2/17

11:00 am-11:18 pm

2 stops19h 18m

$489

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 2/4

11:20 am-9:35 am

2 stops15h 15m

Barcelona-El Prat

Sun 2/8

5:50 am-9:13 pm

2 stops22h 23m

$491

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 2/4

11:20 am-9:35 am

2 stops15h 15m

Barcelona-El Prat

Sun 2/8

5:50 am-10:58 pm

2 stops24h 08m

$492

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 February is, on average, the cheapest month to fly to Barcelona from St. Louis, with most prices found around $657. If you don’t want to visit Barcelona in February, then you should wait until November to fly from St. Louis, when ticket prices are also cheap, with an average price of $663.

What is the cheapest day to depart on your flight to Barcelona?

The cheapest day to depart from St. Louis to Barcelona is on a Tuesday when prices can be found for as low as $867. On the other hand, Thursday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,135.

What is the cheapest time of day to depart on your flight to Barcelona?

In the morning is the cheapest time of day to fly from St. Louis to Barcelona when you can find flight prices for as low as $905. Flying to Barcelona in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,043 on average. Flights to Barcelona from St. Louis in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $895 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 $724 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	11h 40m
Direct flights	None

The fastest flight from St. Louis to Barcelona takes 11h 40m

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 11h 40m.
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 December 2025, 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
Delta	PriceFrom $552	Free Cancellation	Rating 7.9 8,014 reviews	Search Delta flights
United Airlines	PriceFrom $567	Free Cancellation	Rating 7.4 9,102 reviews	Search United Airlines flights
Lufthansa	PriceFrom $568	Free Cancellation	Rating 6.8 7,643 reviews	Search Lufthansa flights
British Airways	PriceFrom $589	Free Cancellation	Rating 6.7 7,602 reviews	Search British Airways flights
KLM	PriceFrom $590	Free Cancellation	Rating 7.7 1,431 reviews	Search KLM flights
Air Canada	PriceFrom $624	Free Cancellation	Rating 7.1 10,551 reviews	Search Air Canada flights
Iberia	PriceFrom $631	Free Cancellation	Rating 7.0 3,055 reviews	Search Iberia flights
American Airlines	PriceFrom $632	Free Cancellation	Rating 7.2 11,051 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.