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

Aer Lingus, United Airlines, and Lufthansa 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 September 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.

$329 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

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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 - 8:20 pmBCN Barcelona-El Prat-STL Lambert-St Louis

14h 05m1 stop Toronto Pearson Intl

$521Air Canada

Mon, Oct 5 - Wed, Oct 21

11:35 am - 9:20 amSTL Lambert-St Louis-BCN Barcelona-El Prat

14h 45m2 stops Chicago O'Hare Intl Toronto Pearson Intl

1:15 pm - 8:20 pmBCN Barcelona-El Prat-STL Lambert-St Louis

14h 05m1 stop Toronto Pearson Intl

$526Air Canada

Mon, Oct 5 - Wed, Oct 21

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

12h 50m1 stop Montreal Pierre Elliott Trudeau Intl

1:15 pm - 8:20 pmBCN Barcelona-El Prat-STL Lambert-St Louis

14h 05m1 stop Toronto Pearson Intl

$551Multiple Airlines

Mon, Oct 12 - Wed, Oct 21

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

12h 50m1 stop Montreal Pierre Elliott Trudeau Intl

1:15 pm - 8:20 pmBCN Barcelona-El Prat-STL Lambert-St Louis

14h 05m1 stop Toronto Pearson Intl

$555Multiple Airlines

Mon, Oct 12 - Wed, Oct 21

11:45 am - 8:20 amSTL Lambert-St Louis-BCN Barcelona-El Prat

13h 35m1 stop Newark

1:35 pm - 4:40 pmBCN Barcelona-El Prat-STL Lambert-St Louis

34h 05m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$560United Airlines

Wed, Feb 3 - Fri, Feb 12

6:30 am - 8:20 amSTL Lambert-St Louis-BCN Barcelona-El Prat

18h 50m1 stop Newark

1:35 pm - 4:40 pmBCN Barcelona-El Prat-STL Lambert-St Louis

34h 05m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$560United Airlines

Wed, Feb 3 - Fri, Feb 12

12:50 pm - 1:45 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

17h 55m2 stops Dallas/Fort Worth London Heathrow

12:00 pm - 10:58 pmBCN Barcelona-El Prat-STL Lambert-St Louis

17h 58m1 stop Philadelphia

$561Iberia

Wed, Feb 3 - Fri, Feb 12

1:15 pm - 9:10 amSTL Lambert-St Louis-BCN Barcelona-El Prat

12h 55m1 stop Philadelphia

12:00 pm - 10:58 pmBCN Barcelona-El Prat-STL Lambert-St Louis

17h 58m1 stop Philadelphia

$563British Airways

Wed, Feb 3 - Fri, Feb 12

1:40 pm - 12:45 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

16h 05m2 stops Chicago O'Hare Intl Madrid Barajas

12:00 pm - 10:58 pmBCN Barcelona-El Prat-STL Lambert-St Louis

17h 58m1 stop Philadelphia

$573Iberia

Wed, Feb 3 - Fri, Feb 12

9:52 am - 1:45 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

20h 53m2 stops Boston Logan Intl London Heathrow

12:00 pm - 10:58 pmBCN Barcelona-El Prat-STL Lambert-St Louis

17h 58m1 stop Philadelphia

$577British Airways

Wed, Feb 3 - Fri, Feb 12

Cheap last minute 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

6:40 am - 1:25 pmBCN Barcelona-El Prat-STL Lambert-St Louis

13h 45m1 stop Frankfurt am Main

$1,025Multiple Airlines

Tue, Sep 15 - Wed, Sep 23

8:55 am - 9:20 amSTL Lambert-St Louis-BCN Barcelona-El Prat

17h 25m1 stop Toronto Pearson Intl

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

19h 01m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$1,029Multiple Airlines

Tue, Sep 15 - Wed, Sep 23

8:30 am - 8:00 amSTL Lambert-St Louis-BCN Barcelona-El Prat

16h 30m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

12:15 pm - 12:13 pmBCN Barcelona-El Prat-STL Lambert-St Louis

30h 58m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,037Air Canada

Tue, Sep 15 - Wed, Sep 23

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

12h 50m1 stop Montreal Pierre Elliott Trudeau Intl

7:00 pm - 1:25 pmBCN Barcelona-El Prat-STL Lambert-St Louis

25h 25m1 stop Frankfurt am Main

$1,045Multiple Airlines

Tue, Sep 15 - Mon, Sep 21

12:10 pm - 2:55 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

19h 45m2 stops Montreal Pierre Elliott Trudeau Intl Munich Franz Josef Strauss

12:40 pm - 1:25 pmBCN Barcelona-El Prat-STL Lambert-St Louis

31h 45m1 stop Frankfurt am Main

$1,047Multiple Airlines

Tue, Sep 15 - Mon, Sep 21

8:54 am - 2:00 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

22h 06m2 stops Boston Logan Intl Madrid Barajas

9:10 pm - 11:43 pmBCN Barcelona-El Prat-STL Lambert-St Louis

33h 33m2 stops Madrid Barajas Dallas/Fort Worth

$1,087Iberia

Tue, Sep 15 - Mon, Sep 21

11:01 am - 10:20 amSTL Lambert-St Louis-BCN Barcelona-El Prat

16h 19m2 stops Chicago O'Hare Intl Dublin

11:00 am - 12:27 amBCN Barcelona-El Prat-STL Lambert-St Louis

20h 27m2 stops Dublin Chicago O'Hare Intl

$1,291Aer Lingus

Tue, Sep 15 - Thu, Sep 17

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

$1,310Multiple Airlines

Tue, Sep 15 - Thu, Sep 17

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

12h 50m1 stop Montreal Pierre Elliott Trudeau Intl

12:15 pm - 8:47 pmBCN Barcelona-El Prat-STL Lambert-St Louis

39h 32m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$1,315United Airlines

Tue, Sep 15 - Thu, Sep 17

2:40 pm - 10:30 pmSTL Lambert-St Louis-BCN Barcelona-El Prat

24h 50m2 stops Toronto Pearson Intl Dublin

11:25 am - 2:00 pmBCN Barcelona-El Prat-STL Lambert-St Louis

33h 35m3 stops Lisbon Humberto Delgado Dublin Toronto Pearson Intl

$1,380Multiple Airlines

Tue, Sep 15 - Thu, Sep 17

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United Airlines flights from St. Louis to Barcelona

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

United Airlines

Feb 3

STL11:45 amLambert-St Louis

13h 35m

1 stop

BCN8:20 amBarcelona-El Prat

Feb 12

BCN1:35 pmBarcelona-El Prat

34h 05m

2 stops

STL4:40 pmLambert-St Louis

$560

United Airlines

Oct 12

STL6:00 amLambert-St Louis

24h 15m

1 stop

BCN1:15 pmBarcelona-El Prat

Oct 21

BCN1:15 pmBarcelona-El Prat

31h 45m

1 stop

STL2:00 pmLambert-St Louis

$561

United Airlines

Sep 22

STL12:10 pmLambert-St Louis

12h 50m

1 stop

BCN8:00 amBarcelona-El Prat

Sep 30

BCN12:15 pmBarcelona-El Prat

13h 26m

1 stop

STL6:41 pmLambert-St Louis

$567

Iberia flights from St. Louis to Barcelona

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

Iberia

Feb 3

STL1:40 pmLambert-St Louis

16h 05m

2 stops

BCN12:45 pmBarcelona-El Prat

Feb 12

BCN12:00 pmBarcelona-El Prat

17h 58m

1 stop

STL10:58 pmLambert-St Louis

$573

Iberia

Oct 19

STL12:46 pmLambert-St Louis

14h 24m

1 stop

BCN10:10 amBarcelona-El Prat

Nov 16

BCN5:00 pmBarcelona-El Prat

23h 30m

2 stops

STL9:30 amLambert-St Louis

$587

Iberia

Feb 2

STL9:51 amLambert-St Louis

15h 34m

2 stops

BCN8:25 amBarcelona-El Prat

Feb 12

BCN12:00 pmBarcelona-El Prat

17h 58m

1 stop

STL10:58 pmLambert-St Louis

$591

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 10/5

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 10/21

1:15 pm-8:20 pm

1 stop14h 05m

$521

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 10/5

11:35 am-9:20 am

2 stops14h 45m

Barcelona-El Prat

Wed 10/21

1:15 pm-8:20 pm

1 stop14h 05m

$526

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 10/12

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 10/21

1:15 pm-8:20 pm

1 stop14h 05m

$551

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Mon 10/12

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 10/21

1:15 pm-8:20 pm

1 stop14h 05m

$555

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 2/3

11:45 am-8:20 am

1 stop13h 35m

Barcelona-El Prat

Fri 2/12

1:35 pm-4:40 pm

2 stops34h 05m

$560

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 2/3

6:30 am-8:20 am

1 stop18h 50m

Barcelona-El Prat

Fri 2/12

1:35 pm-4:40 pm

2 stops34h 05m

$560

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 2/3

12:50 pm-1:45 pm

2 stops17h 55m

Barcelona-El Prat

Fri 2/12

12:00 pm-10:58 pm

1 stop17h 58m

$561

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 2/3

1:15 pm-9:10 am

1 stop12h 55m

Barcelona-El Prat

Fri 2/12

12:00 pm-10:58 pm

1 stop17h 58m

$563

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 2/3

1:40 pm-12:45 pm

2 stops16h 05m

Barcelona-El Prat

Fri 2/12

12:00 pm-10:58 pm

1 stop17h 58m

$573

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 2/3

9:52 am-1:45 pm

2 stops20h 53m

Barcelona-El Prat

Fri 2/12

12:00 pm-10:58 pm

1 stop17h 58m

$577

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 $778 to $1,070.
The lowest price recently found on this route was $521.

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 $917 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	$329
Fastest flight time	12h 50m
Direct flights	None

The best one-way flight to Barcelona from St. Louis in the past 72 hours is $329. The best round-trip flight deal from St. Louis to Barcelona found on momondo in the last 72 hours is $521.

The fastest flight from St. Louis to Barcelona takes 12h 50m

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 12h 50m.
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 September 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 8,221 reviews	Search Lufthansa flights
British Airways	PriceFrom $540	Free Cancellation	Rating 6.7 8,215 reviews	Search British Airways flights
Delta	PriceFrom $552	Free Cancellation	Rating 7.8 8,567 reviews	Search Delta flights
American Airlines	PriceFrom $629	Free Cancellation	Rating 7.1 12,050 reviews	Search American Airlines flights
Air Canada	PriceFrom $648	Free Cancellation	Rating 7.1 11,620 reviews	Search Air Canada flights
United Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 10,211 reviews	Search United Airlines flights
Iberia	PriceFrom $732	Free Cancellation	Rating 7.0 3,247 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.

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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 $329

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 10/1. 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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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

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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

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According to popular flight searches on momondo this year