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Cheap flights from St. Louis to Barcelona from $306

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 12/10. 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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Find the cheapest flights from St. Louis to Barcelona

Cheap round-trip flights

Scandinavian Airlines Logo
11:51 am - 6:20 pmSTL-BCN
23h 29m2 stops
Scandinavian Airlines Logo
7:10 pm - 11:40 pmBCN-STL
35h 30m2 stops
$499Scandinavian Airlines
Find Deal
Thu, Jan 15 - Sun, Feb 1
Iberia Logo
1:48 pm - 12:40 pmSTL-BCN
15h 52m2 stops
Iberia Logo
9:45 am - 10:27 pmBCN-STL
19h 42m2 stops
$524Iberia
Find Deal
Sun, Feb 1 - Wed, Feb 11
United Airlines Logo
1:30 pm - 7:50 amSTL-BCN
11h 20m1 stop
United Airlines Logo
12:10 pm - 10:48 amBCN-STL
29h 38m2 stops
$525United Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 14
United Airlines Logo
9:20 am - 7:50 amSTL-BCN
15h 30m2 stops
United Airlines Logo
12:10 pm - 10:48 amBCN-STL
29h 38m2 stops
$530United Airlines
Find Deal
Tue, Sep 30 - Tue, Oct 14
Air Canada Logo
9:15 am - 7:50 amSTL-BCN
39h 35m2 stops
Air Canada Logo
12:35 pm - 5:39 pmBCN-STL
35h 04m2 stops
$532Air Canada
Find Deal
Sat, Oct 4 - Fri, Oct 31
Scandinavian Airlines Logo
3:59 pm - 6:10 pmSTL-BCN
19h 11m2 stops
Scandinavian Airlines Logo
7:10 pm - 11:40 pmBCN-STL
35h 30m2 stops
$533Scandinavian Airlines
Find Deal
Fri, Oct 24 - Sat, Nov 8
Air Canada Logo
5:00 am - 7:50 amSTL-BCN
19h 50m2 stops
Air Canada Logo
12:10 pm - 7:57 pmBCN-STL
14h 47m1 stop
$539Air Canada
Find Deal
Sun, Sep 28 - Wed, Oct 8
British Airways Logo
10:36 am - 9:05 amSTL-BCN
15h 29m1 stop
British Airways Logo
12:20 pm - 11:18 pmBCN-STL
17h 58m1 stop
$581British Airways
Find Deal
Tue, Oct 14 - Tue, Oct 21
American Airlines Logo
6:00 am - 6:45 amSTL-BCN
17h 45m1 stop
American Airlines Logo
12:50 pm - 10:55 pmBCN-STL
17h 05m1 stop
$584American Airlines
Find Deal
Wed, Oct 1 - Wed, Oct 15
British Airways Logo
5:49 pm - 7:50 amSTL-BCN
31h 01m1 stop
British Airways Logo
8:00 pm - 9:48 pmBCN-STL
31h 48m2 stops
$592British Airways
Find Deal
Sat, Mar 7 - Mon, Mar 16

Scandinavian Airlines flights from St. Louis to Barcelona

Our best Scandinavian Airlines deals on St. Louis to Barcelona flight tickets
Scandinavian Airlines
Jan 15
STL11:51 amLambert-St Louis
23h 29m
2 stops
BCN6:20 pmBarcelona-El Prat
Feb 1
BCN7:10 pmBarcelona-El Prat
35h 30m
2 stops
STL11:40 pmLambert-St Louis
$499
Find similar
Scandinavian Airlines
Oct 24
STL3:59 pmLambert-St Louis
19h 11m
2 stops
BCN6:10 pmBarcelona-El Prat
Nov 8
BCN7:10 pmBarcelona-El Prat
35h 30m
2 stops
STL11:40 pmLambert-St Louis
$533
Find similar

Iberia flights from St. Louis to Barcelona

Our best Iberia deals on St. Louis to Barcelona flight tickets
Iberia
Feb 1
STL1:48 pmLambert-St Louis
15h 52m
2 stops
BCN12:40 pmBarcelona-El Prat
Feb 11
BCN9:45 amBarcelona-El Prat
19h 42m
2 stops
STL10:27 pmLambert-St Louis
$524
Find similar
Iberia
Sep 23
STL1:03 pmLambert-St Louis
13h 02m
1 stop
BCN9:05 amBarcelona-El Prat
Oct 4
BCN10:45 amBarcelona-El Prat
16h 47m
1 stop
STL8:32 pmLambert-St Louis
$636
Find similar
Iberia
Sep 22
STL3:56 pmLambert-St Louis
11h 34m
1 stop
BCN10:30 amBarcelona-El Prat
Sep 28
BCN10:45 amBarcelona-El Prat
16h 40m
1 stop
STL8:25 pmLambert-St Louis
$1,439
Find similar

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 September 14, 2025.
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

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 1/15

11:51 am-6:20 pm

2 stops23h 29m

Barcelona-El Prat

Sun 2/1

7:10 pm-11:40 pm

2 stops35h 30m

$499

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

1:48 pm-12:40 pm

2 stops15h 52m

Barcelona-El Prat

Wed 2/11

9:45 am-10:27 pm

2 stops19h 42m

$524

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/30

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Tue 10/14

12:10 pm-10:48 am

2 stops29h 38m

$525

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/30

9:20 am-7:50 am

2 stops15h 30m

Barcelona-El Prat

Tue 10/14

12:10 pm-10:48 am

2 stops29h 38m

$530

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 10/4

9:15 am-7:50 am

2 stops39h 35m

Barcelona-El Prat

Fri 10/31

12:35 pm-5:39 pm

2 stops35h 04m

$532

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/24

3:59 pm-6:10 pm

2 stops19h 11m

Barcelona-El Prat

Sat 11/8

7:10 pm-11:40 pm

2 stops35h 30m

$533

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/28

5:00 am-7:50 am

2 stops19h 50m

Barcelona-El Prat

Wed 10/8

12:10 pm-7:57 pm

1 stop14h 47m

$539

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/14

10:36 am-9:05 am

1 stop15h 29m

Barcelona-El Prat

Tue 10/21

12:20 pm-11:18 pm

1 stop17h 58m

$581

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/1

6:00 am-6:45 am

1 stop17h 45m

Barcelona-El Prat

Wed 10/15

12:50 pm-10:55 pm

1 stop17h 05m

$584

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 3/7

5:49 pm-7:50 am

1 stop31h 01m

Barcelona-El Prat

Mon 3/16

8:00 pm-9:48 pm

2 stops31h 48m

$592

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 February is, on average, the cheapest month to fly to Barcelona from St. Louis, with most prices found around $660. 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 $694.

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 $946 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

Direct flights

None
There are no direct flights from St. Louis to Barcelona. There are no popular flight routes from St. Louis to Barcelona.
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  • 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
United AirlinesPriceFrom $573Free CancellationRating
7.4
8,931 reviews
Search United Airlines flights
KLMPriceFrom $590Free CancellationRating
7.8
1,385 reviews
Search KLM flights
British AirwaysPriceFrom $602Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
DeltaPriceFrom $602Free CancellationRating
7.9
7,956 reviews
Search Delta flights
LufthansaPriceFrom $614Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
Air CanadaPriceFrom $624Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
IberiaPriceFrom $631Free CancellationRating
7.0
2,928 reviews
Search Iberia flights
American AirlinesPriceFrom $648Free CancellationRating
7.2
10,000 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.

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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