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

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

What airlines fly to Barcelona?

United Airlines, Air Canada and British Airways 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 45% of people opting to fly with this airline when traveling to Barcelona. Keep in mind that there are 7 different airlines that fly to Barcelona on a routine basis, so you have a few additional options to choose from.

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 August 2026, there are 7 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.

$366 Cheap Flights from St. Louis to Barcelona in 2026

Discover deals from 900+ travel sites with momondo.

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.

12:10 pm - 8:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

12h 50m1 stop Montreal Pierre Elliott Trudeau Intl

1:15 pm - 2:00 pmBCN Barcelona-El Prat-STL Lambert-St Louis

31h 45m1 stop Toronto Pearson Intl

$682Air Canada

Mon, Sep 28 - Wed, Oct 14

12:10 pm - 8:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

12h 50m1 stop Montreal Pierre Elliott Trudeau Intl

1:15 pm - 2:00 pmBCN Barcelona-El Prat-STL Lambert-St Louis

31h 45m1 stop Toronto Pearson Intl

$694Multiple Airlines

Tue, Oct 6 - Fri, Oct 16

8:00 am - 8:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

17h 00m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:40 am - 9:21 pmBCN Barcelona-El Prat-STL Lambert-St Louis

21h 41m2 stops Frankfurt am Main Chicago O'Hare Intl

$695Multiple Airlines

Tue, Oct 6 - Fri, Oct 16

12:10 pm - 8:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

12h 50m1 stop Montreal Pierre Elliott Trudeau Intl

9:40 am - 6:41 pmBCN Barcelona-El Prat-STL Lambert-St Louis

16h 01m2 stops Zurich Montreal Pierre Elliott Trudeau Intl

$699Air Canada

Mon, Sep 28 - Wed, Oct 14

3:15 pm - 1:15 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

15h 00m1 stop Chicago O'Hare Intl

1:35 pm - 12:10 pmBCN Barcelona-El Prat-STL Lambert-St Louis

29h 35m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$706United Airlines

Mon, Nov 9 - Wed, Nov 18

6:50 pm - 1:15 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

11h 25m1 stop Chicago O'Hare Intl

1:35 pm - 12:10 pmBCN Barcelona-El Prat-STL Lambert-St Louis

29h 35m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$706United Airlines

Wed, Nov 11 - Wed, Nov 18

10:05 am - 8:35 amSTL Lambert-St Louis-BCN Barcelona-El Prat

15h 30m2 stops Atlanta Hartsfield-Jackson Boston Logan Intl

11:10 am - 8:51 pmBCN Barcelona-El Prat-STL Lambert-St Louis

16h 41m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$718Delta

Mon, Sep 28 - Wed, Oct 14

2:30 pm - 12:50 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

15h 20m1 stop Atlanta Hartsfield-Jackson

11:10 am - 8:51 pmBCN Barcelona-El Prat-STL Lambert-St Louis

16h 41m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$718Delta

Mon, Sep 28 - Wed, Oct 14

1:20 pm - 12:45 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

16h 25m2 stops Chicago O'Hare Intl Madrid Barajas

9:10 pm - 7:30 pmBCN Barcelona-El Prat-STL Lambert-St Louis

29h 20m2 stops Madrid Barajas Dallas/Fort Worth

$770Iberia

Mon, Nov 30 - Wed, Apr 7

9:33 am - 9:10 amSTL Lambert-St Louis-BCN Barcelona-El Prat

16h 37m1 stop Philadelphia

9:15 pm - 10:05 pmBCN Barcelona-El Prat-STL Lambert-St Louis

31h 50m2 stops Madrid Barajas Dallas/Fort Worth

$776Iberia

Mon, Jan 18 - Mon, Feb 15

Cheap last minute flights

Enter your travel dates to find the best prices.

12:27 pm - 1:05 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

17h 38m2 stops Newark Frankfurt am Main

6:40 am - 11:38 pmBCN Barcelona-El Prat-STL Lambert-St Louis

23h 58m2 stops Frankfurt am Main Newark

$1,160Lufthansa

Fri, Sep 4 - Sat, Sep 12

1:00 pm - 8:30 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

24h 30m2 stops Washington, D.C. Dulles Intl Brussels Bruxelles-National

5:35 am - 7:11 pmBCN Barcelona-El Prat-STL Lambert-St Louis

20h 36m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

$1,182Brussels Airlines

Fri, Sep 4 - Sat, Sep 12

12:27 pm - 1:05 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

17h 38m2 stops Newark Frankfurt am Main

6:40 am - 11:38 pmBCN Barcelona-El Prat-STL Lambert-St Louis

23h 58m2 stops Frankfurt am Main Newark

$1,225Lufthansa

Fri, Sep 4 - Sat, Sep 12

5:00 pm - 9:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

33h 00m1 stop Newark

6:40 am - 11:38 pmBCN Barcelona-El Prat-STL Lambert-St Louis

23h 58m2 stops Frankfurt am Main Newark

$1,226Lufthansa

Fri, Sep 4 - Sat, Sep 12

3:30 pm - 6:15 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

19h 45m1 stop Frankfurt am Main

6:40 am - 11:38 pmBCN Barcelona-El Prat-STL Lambert-St Louis

23h 58m2 stops Frankfurt am Main Newark

$1,255Lufthansa

Fri, Sep 4 - Sat, Sep 12

3:50 pm - 2:50 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

16h 00m2 stops Minneapolis St Paul Paris Charles de Gaulle

6:20 am - 11:16 pmBCN Barcelona-El Prat-STL Lambert-St Louis

23h 56m2 stops Amsterdam Schiphol Minneapolis St Paul

$1,342Delta

Fri, Sep 4 - Sat, Sep 12

5:00 pm - 9:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

33h 00m1 stop Newark

12:00 pm - 8:47 pmBCN Barcelona-El Prat-STL Lambert-St Louis

15h 47m1 stop Newark

$1,374United Airlines

Fri, Sep 4 - Sat, Sep 12

5:00 pm - 9:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

33h 00m1 stop Newark

12:00 pm - 8:47 pmBCN Barcelona-El Prat-STL Lambert-St Louis

15h 47m1 stop Newark

$1,455United Airlines

Fri, Sep 4 - Sat, Sep 12

5:00 pm - 9:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

33h 00m1 stop Newark

6:00 am - 8:47 pmBCN Barcelona-El Prat-STL Lambert-St Louis

21h 47m2 stops Zurich Newark

$1,455Multiple Airlines

Fri, Sep 4 - Sat, Sep 12

5:42 pm - 6:45 amSTL Lambert-St Louis-BCN Barcelona-El Prat

30h 03m1 stop Philadelphia

12:20 pm - 1:21 pmBCN Barcelona-El Prat-STL Lambert-St Louis

32h 01m1 stop Miami

$1,576Multiple Airlines

Fri, Sep 4 - Sat, Sep 12

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from St. Louis to Barcelona

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

United Airlines

Sep 28

STL11:35 amLambert-St Louis

18h 40m

1 stop

BCN1:15 pmBarcelona-El Prat

Oct 14

BCN12:15 pmBarcelona-El Prat

34h 28m

2 stops

STL3:43 pmLambert-St Louis

$706

United Airlines

Sep 28

STL7:01 pmLambert-St Louis

29h 59m

2 stops

BCN8:00 amBarcelona-El Prat

Oct 14

BCN12:15 pmBarcelona-El Prat

34h 28m

2 stops

STL3:43 pmLambert-St Louis

$709

United Airlines

Sep 28

STL1:09 pmLambert-St Louis

12h 11m

1 stop

BCN8:20 amBarcelona-El Prat

Oct 14

BCN12:15 pmBarcelona-El Prat

13h 26m

1 stop

STL6:41 pmLambert-St Louis

$711

Iberia flights from St. Louis to Barcelona

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

Iberia

Nov 30

STL1:20 pmLambert-St Louis

16h 25m

2 stops

BCN12:45 pmBarcelona-El Prat

Apr 7

BCN9:10 pmBarcelona-El Prat

29h 20m

2 stops

STL7:30 pmLambert-St Louis

$770

Iberia

Jan 18

STL9:33 amLambert-St Louis

16h 37m

1 stop

BCN9:10 amBarcelona-El Prat

Feb 15

BCN9:15 pmBarcelona-El Prat

31h 50m

2 stops

STL10:05 pmLambert-St Louis

$776

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 9/28

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 10/14

1:15 pm-2:00 pm

1 stop31h 45m

$682

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Tue 10/6

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Fri 10/16

1:15 pm-2:00 pm

1 stop31h 45m

$694

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Tue 10/6

8:00 am-8:00 am

2 stops17h 00m

Barcelona-El Prat

Fri 10/16

6:40 am-9:21 pm

2 stops21h 41m

$695

Quickest round-trip

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 9/28

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 10/14

9:40 am-6:41 pm

2 stops16h 01m

$699

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 11/9

3:15 pm-1:15 pm

1 stop15h 00m

Barcelona-El Prat

Wed 11/18

1:35 pm-12:10 pm

2 stops29h 35m

$706

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 11/11

6:50 pm-1:15 pm

1 stop11h 25m

Barcelona-El Prat

Wed 11/18

1:35 pm-12:10 pm

2 stops29h 35m

$706

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 9/28

10:05 am-8:35 am

2 stops15h 30m

Barcelona-El Prat

Wed 10/14

11:10 am-8:51 pm

2 stops16h 41m

$718

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 9/28

2:30 pm-12:50 pm

1 stop15h 20m

Barcelona-El Prat

Wed 10/14

11:10 am-8:51 pm

2 stops16h 41m

$718

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 11/30

1:20 pm-12:45 pm

2 stops16h 25m

Barcelona-El Prat

Wed 4/7

9:10 pm-7:30 pm

2 stops29h 20m

$770

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 1/18

9:33 am-9:10 am

1 stop16h 37m

Barcelona-El Prat

Mon 2/15

9:15 pm-10:05 pm

2 stops31h 50m

$776

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 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 $750 to $1,056.
The lowest price recently found on this route was $682.

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 $558. If you don’t want to visit Barcelona in January, then you should wait until April to fly from St. Louis, when ticket prices are also cheap, with an average price of $634.

How far in advance should I book a flight from St. Louis 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 $908 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 $557 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

Best Price Found	$366
Fastest flight time	11h 21m
Direct flights	None

The best one-way flight to Barcelona from St. Louis in the past 72 hours is $366. The best round-trip flight deal from St. Louis to Barcelona found on momondo in the last 72 hours is $682.

The fastest flight from St. Louis to Barcelona takes 11h 21m

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

Search flight deals

Frequently asked questions about flying from St. Louis to Barcelona

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 21m.
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 August 2026, there are 7 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
Lufthansa	PriceFrom $510	Free Cancellation	Rating 6.8 8,227 reviews	Search Lufthansa flights
British Airways	PriceFrom $540	Free Cancellation	Rating 6.7 8,198 reviews	Search British Airways flights
Delta	PriceFrom $552	Free Cancellation	Rating 7.8 8,538 reviews	Search Delta flights
Air Canada	PriceFrom $624	Free Cancellation	Rating 7.1 11,558 reviews	Search Air Canada flights
American Airlines	PriceFrom $629	Free Cancellation	Rating 7.1 12,021 reviews	Search American Airlines flights
United Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 10,148 reviews	Search United Airlines flights
Iberia	PriceFrom $732	Free Cancellation	Rating 7.0 3,248 reviews	Search Iberia 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.

An easier way to manage your Barcelona trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Wed 9/30

Wed 10/7

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Spain

Nearby airports

Airlines

Other Spain destinations

Other flights from St. Louis

Complete your trip

Feeling lucky

Fly into one of these airports located in Barcelona

Barcelona-El Prat Airport

Girona Costa Brava Airport

Cheap flights from St. Louis to Barcelona from $366

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Barcelona departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from St. Louis to Barcelona

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

United Airlines flights from St. Louis to Barcelona

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

Iberia flights from St. Louis to Barcelona

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

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to Barcelona that are best for you.

See travel insights to Barcelona from

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

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

What is the cheapest month to fly to Barcelona?

How far in advance should I book a flight from St. Louis to Barcelona?

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

What airlines fly to Barcelona?

Cheap St. Louis to Barcelona flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Barcelona

Best airlines flying from St. Louis to Barcelona

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

Why use momondo?

An easier way to manage your Barcelona trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Spain

Fly into one of these airports located in Barcelona

Airports listed have a maximum distance of 46.7 mi from Barcelona

Fly your favorite airline to Barcelona

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Popular cities in Spain

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from St. Louis

According to popular flight searches on momondo this year

Complete your trip to Barcelona

Explore popular destinations other users love

According to popular flight searches on momondo this year