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?

United Airlines and KLM 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.

$263 Cheap Flights from St. Louis to Barcelona in 2025/26

Q: What is the typical price of a round-trip flight between St. Louis and Barcelona?

Prices are currently low for flights on this route. Typical prices usually range from $725 to $1,009. The lowest price recently found on this route was $411.

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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.

11:50 am - 9:00 am

STL

BCN

14h 10m1 stop

1:35 pm - 2:26 pm

BCN

STL

31h 51m2 stops

$411Multiple Airlines

mar., dic. 9 - jue., dic. 25

8:30 am - 8:20 am

STL

BCN

16h 50m1 stop

1:35 pm - 7:18 pm

BCN

STL

36h 43m2 stops

$414United Airlines

mar., dic. 9 - jue., dic. 25

6:30 am - 8:20 am

STL

BCN

18h 50m2 stops

1:35 pm - 5:54 pm

BCN

STL

35h 19m2 stops

$419United Airlines

mar., dic. 9 - jue., dic. 25

4:05 pm - 9:35 am

STL

BCN

34h 30m2 stops

1:35 pm - 9:00 pm

BCN

STL

38h 25m2 stops

$420Air Canada

dom., feb. 1 - mar., feb. 17

6:46 pm - 4:05 pm

STL

BCN

14h 19m2 stops

10:40 am - 10:59 pm

BCN

STL

19h 19m1 stop

$424British Airways

mar., ene. 13 - mié., ene. 21

6:30 am - 8:00 am

STL

BCN

18h 30m1 stop

9:15 am - 8:44 am

BCN

STL

29h 29m1 stop

$425Delta

mié., mar. 4 - mar., mar. 10

11:55 am - 8:50 am

STL

BCN

13h 55m1 stop

10:40 am - 10:59 pm

BCN

STL

19h 19m1 stop

$427Iberia

mar., ene. 13 - mié., ene. 21

11:50 am - 9:00 am

STL

BCN

14h 10m1 stop

11:00 am - 11:43 pm

BCN

STL

19h 43m1 stop

$430Lufthansa

mar., dic. 9 - jue., dic. 25

3:54 pm - 2:45 pm

STL

BCN

15h 51m2 stops

6:40 am - 6:14 pm

BCN

STL

18h 34m2 stops

$433British Airways

mar., ene. 13 - mié., ene. 21

6:00 am - 9:00 am

STL

BCN

20h 00m1 stop

11:00 am - 10:05 pm

BCN

STL

18h 05m1 stop

$434Multiple Airlines

dom., feb. 1 - mar., feb. 17

British Airways flights from St. Louis to Barcelona

Our best British Airways deals on St. Louis to Barcelona flight tickets

British Airways

Jan 13

STL6:46 pmLambert-St Louis

14h 19m

2 stops

BCN4:05 pmBarcelona-El Prat

Jan 21

BCN10:40 amBarcelona-El Prat

19h 19m

1 stop

STL10:59 pmLambert-St Louis

$424

Find similar

British Airways

Jan 13

STL3:54 pmLambert-St Louis

15h 51m

2 stops

BCN2:45 pmBarcelona-El Prat

Jan 21

BCN6:40 amBarcelona-El Prat

18h 34m

2 stops

STL6:14 pmLambert-St Louis

$433

Find similar

British Airways

Feb 4

STL3:54 pmLambert-St Louis

15h 46m

2 stops

BCN2:40 pmBarcelona-El Prat

Feb 19

BCN10:40 amBarcelona-El Prat

19h 14m

1 stop

STL10:54 pmLambert-St Louis

$472

Find similar

Delta flights from St. Louis to Barcelona

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

Delta

Mar 4

STL6:30 amLambert-St Louis

18h 30m

1 stop

BCN8:00 amBarcelona-El Prat

Mar 10

BCN9:15 amBarcelona-El Prat

29h 29m

1 stop

STL8:44 amLambert-St Louis

$425

Find similar

Delta

Dec 9

STL6:00 amLambert-St Louis

19h 40m

1 stop

BCN8:40 amBarcelona-El Prat

Dec 25

BCN10:55 amBarcelona-El Prat

19h 43m

1 stop

STL11:38 pmLambert-St Louis

$434

Find similar

Delta

Dec 10

STL11:40 amLambert-St Louis

14h 00m

1 stop

BCN8:40 amBarcelona-El Prat

Dec 25

BCN6:00 amBarcelona-El Prat

18h 00m

2 stops

STL5:00 pmLambert-St Louis

$461

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 12/9

11:50 am-9:00 am

1 stop14h 10m

Barcelona-El Prat

jue. 12/25

1:35 pm-2:26 pm

2 stops31h 51m

$411

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 12/9

8:30 am-8:20 am

1 stop16h 50m

Barcelona-El Prat

jue. 12/25

1:35 pm-7:18 pm

2 stops36h 43m

$414

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 12/9

6:30 am-8:20 am

2 stops18h 50m

Barcelona-El Prat

jue. 12/25

1:35 pm-5:54 pm

2 stops35h 19m

$419

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

dom. 2/1

4:05 pm-9:35 am

2 stops34h 30m

Barcelona-El Prat

mar. 2/17

1:35 pm-9:00 pm

2 stops38h 25m

$420

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 1/13

6:46 pm-4:05 pm

2 stops14h 19m

Barcelona-El Prat

mié. 1/21

10:40 am-10:59 pm

1 stop19h 19m

$424

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mié. 3/4

6:30 am-8:00 am

1 stop18h 30m

Barcelona-El Prat

mar. 3/10

9:15 am-8:44 am

1 stop29h 29m

$425

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 1/13

11:55 am-8:50 am

1 stop13h 55m

Barcelona-El Prat

mié. 1/21

10:40 am-10:59 pm

1 stop19h 19m

$427

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 12/9

11:50 am-9:00 am

1 stop14h 10m

Barcelona-El Prat

jue. 12/25

11:00 am-11:43 pm

1 stop19h 43m

$430

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

mar. 1/13

3:54 pm-2:45 pm

2 stops15h 51m

Barcelona-El Prat

mié. 1/21

6:40 am-6:14 pm

2 stops18h 34m

$433

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

dom. 2/1

6:00 am-9:00 am

1 stop20h 00m

Barcelona-El Prat

mar. 2/17

11:00 am-10:05 pm

1 stop18h 05m

$434

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 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 typical price of a round-trip flight between St. Louis and Barcelona?

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 $913 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 $736 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 30m
Direct flights	None

The fastest flight from St. Louis to Barcelona takes 11h 30m

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 30m.
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 8,009 reviews	Search Delta flights
Lufthansa	PriceFrom $568	Free Cancellation	Rating 6.8 7,612 reviews	Search Lufthansa flights
United Airlines	PriceFrom $574	Free Cancellation	Rating 7.4 9,066 reviews	Search United Airlines flights
British Airways	PriceFrom $589	Free Cancellation	Rating 6.7 7,562 reviews	Search British Airways flights
KLM	PriceFrom $590	Free Cancellation	Rating 7.7 1,430 reviews	Search KLM flights
Air Canada	PriceFrom $624	Free Cancellation	Rating 7.1 10,500 reviews	Search Air Canada flights
Iberia	PriceFrom $631	Free Cancellation	Rating 7.0 3,040 reviews	Search Iberia flights
American Airlines	PriceFrom $632	Free Cancellation	Rating 7.2 11,044 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.