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Cheap flights from St. Louis to Barcelona from $326

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 10/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Barcelona

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
9:35 pm - 8:30 pm
STL
-
BCN
15h 55m
1 stop
American Airlines Logo
11:30 am - 11:25 pm
BCN
-
STL
17h 55m
1 stop
$765American Airlines
Wed, Oct 14 - Wed, Oct 28
Iberia Logo
9:35 pm - 10:40 pm
STL
-
BCN
18h 05m
1 stop
Iberia Logo
9:45 am - 8:08 pm
BCN
-
STL
16h 23m
2 stops
$776Iberia
Wed, Oct 14 - Wed, Oct 28
United Airlines Logo
2:00 pm - 8:20 am
STL
-
BCN
11h 20m
1 stop
United Airlines Logo
1:35 pm - 10:27 am
BCN
-
STL
27h 52m
2 stops
$783United Airlines
Mon, Nov 16 - Fri, Nov 20
Air Canada Logo
8:00 am - 8:00 am
STL
-
BCN
17h 00m
2 stops
Air Canada Logo
12:35 pm - 2:18 pm
BCN
-
STL
31h 43m
2 stops
$786Air Canada
Wed, Oct 14 - Wed, Oct 28
British Airways Logo
9:35 pm - 8:30 pm
STL
-
BCN
15h 55m
1 stop
British Airways Logo
10:15 am - 7:30 pm
BCN
-
STL
16h 15m
1 stop
$789British Airways
Wed, Aug 19 - Tue, Oct 20
Multiple Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Multiple Airlines Logo
6:40 am - 1:25 pm
BCN
-
STL
13h 45m
1 stop
$795Multiple Airlines
Wed, Aug 19 - Tue, Oct 20
United Airlines Logo
2:00 pm - 8:20 am
STL
-
BCN
11h 20m
1 stop
United Airlines Logo
6:50 am - 1:45 pm
BCN
-
STL
13h 55m
1 stop
$796United Airlines
Mon, Nov 16 - Fri, Nov 20
Air Canada Logo
8:00 am - 8:00 am
STL
-
BCN
17h 00m
2 stops
Air Canada Logo
6:40 am - 6:41 pm
BCN
-
STL
19h 01m
2 stops
$798Air Canada
Wed, Aug 19 - Tue, Oct 20
United Airlines Logo
7:25 am - 8:00 am
STL
-
BCN
17h 35m
2 stops
United Airlines Logo
6:40 am - 1:25 pm
BCN
-
STL
13h 45m
1 stop
$800United Airlines
Wed, Aug 19 - Tue, Oct 20
United Airlines Logo
2:00 pm - 8:20 am
STL
-
BCN
11h 20m
1 stop
United Airlines Logo
3:05 pm - 10:54 pm
BCN
-
STL
14h 49m
1 stop
$803United Airlines
Mon, Nov 16 - Thu, Nov 19

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Iberia flights from St. Louis to Barcelona

Our best Iberia deals on St. Louis to Barcelona flight tickets
Iberia
Oct 14
STL9:35 pmLambert-St Louis
18h 05m
1 stop
BCN10:40 pmBarcelona-El Prat
Oct 28
BCN9:45 amBarcelona-El Prat
16h 23m
2 stops
STL8:08 pmLambert-St Louis
$776
Iberia
Oct 3
STL5:18 pmLambert-St Louis
35h 27m
2 stops
BCN11:45 amBarcelona-El Prat
Oct 12
BCN9:10 pmBarcelona-El Prat
29h 58m
2 stops
STL8:08 pmLambert-St Louis
$810
Iberia
Oct 7
STL9:35 pmLambert-St Louis
18h 05m
1 stop
BCN10:40 pmBarcelona-El Prat
Oct 18
BCN7:10 pmBarcelona-El Prat
20h 54m
1 stop
STL9:04 amLambert-St Louis
$830

American Airlines flights from St. Louis to Barcelona

Our best American Airlines deals on St. Louis to Barcelona flight tickets
American Airlines
Oct 14
STL9:35 pmLambert-St Louis
15h 55m
1 stop
BCN8:30 pmBarcelona-El Prat
Oct 28
BCN11:30 amBarcelona-El Prat
17h 55m
1 stop
STL11:25 pmLambert-St Louis
$765
American Airlines
Dec 1
STL2:17 pmLambert-St Louis
14h 03m
2 stops
BCN11:20 amBarcelona-El Prat
Dec 5
BCN12:00 pmBarcelona-El Prat
15h 21m
1 stop
STL8:21 pmLambert-St Louis
$820
American Airlines
Dec 1
STL2:17 pmLambert-St Louis
14h 03m
2 stops
BCN11:20 amBarcelona-El Prat
Dec 5
BCN12:00 pmBarcelona-El Prat
16h 52m
2 stops
STL9:52 pmLambert-St Louis
$824

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Barcelona that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 10, 2026.
Use the filters below to find and compare flights from St. Louis to Barcelona that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/14

9:35 pm-8:30 pm

1 stop15h 55m

Barcelona-El Prat

Wed 10/28

11:30 am-11:25 pm

1 stop17h 55m

$765

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/14

9:35 pm-10:40 pm

1 stop18h 05m

Barcelona-El Prat

Wed 10/28

9:45 am-8:08 pm

2 stops16h 23m

$776

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/16

2:00 pm-8:20 am

1 stop11h 20m

Barcelona-El Prat

Fri 11/20

1:35 pm-10:27 am

2 stops27h 52m

$783

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/14

8:00 am-8:00 am

2 stops17h 00m

Barcelona-El Prat

Wed 10/28

12:35 pm-2:18 pm

2 stops31h 43m

$786

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 8/19

9:35 pm-8:30 pm

1 stop15h 55m

Barcelona-El Prat

Tue 10/20

10:15 am-7:30 pm

1 stop16h 15m

$789

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 8/19

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Tue 10/20

6:40 am-1:25 pm

1 stop13h 45m

$795
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/16

2:00 pm-8:20 am

1 stop11h 20m

Barcelona-El Prat

Fri 11/20

6:50 am-1:45 pm

1 stop13h 55m

$796

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 8/19

8:00 am-8:00 am

2 stops17h 00m

Barcelona-El Prat

Tue 10/20

6:40 am-6:41 pm

2 stops19h 01m

$798

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 8/19

7:25 am-8:00 am

2 stops17h 35m

Barcelona-El Prat

Tue 10/20

6:40 am-1:25 pm

1 stop13h 45m

$800

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/16

2:00 pm-8:20 am

1 stop11h 20m

Barcelona-El Prat

Thu 11/19

3:05 pm-10:54 pm

1 stop14h 49m

$803

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Barcelona from

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

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 December is, on average, the cheapest month to fly to Barcelona from St. Louis, with most prices found around $414. If you don’t want to visit Barcelona in December, then you should wait until March to fly from St. Louis, when ticket prices are also cheap, with an average price of $431.

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 $846 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

Fastest flight time

11h 20m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 11h 20m
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 20m.

  • 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?

  • 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
LufthansaPriceFrom $510Free CancellationRating
6.8
8,053 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
8,039 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,397 reviews
Search Delta flights
Air CanadaPriceFrom $560Free CancellationRating
7.1
11,158 reviews
Search Air Canada flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,808 reviews
Search United Airlines flights
American AirlinesPriceFrom $607Free CancellationRating
7.1
11,637 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,232 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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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
Barcelona-El Prat Airport
Girona Costa Brava Airport