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Cheap flights from St. Louis to Barcelona from $353

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 10/7. 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.
United Airlines Logo
1:00 pm - 9:00 am
STL
-
BCN
13h 00m
1 stop
United Airlines Logo
1:35 pm - 3:41 pm
BCN
-
STL
33h 06m
2 stops
$753United Airlines
Sun, Dec 6 - Wed, Dec 9
Air Canada Logo
7:33 am - 9:35 am
STL
-
BCN
19h 02m
2 stops
Air Canada Logo
1:35 pm - 2:30 pm
BCN
-
STL
31h 55m
2 stops
$756Air Canada
Sun, Dec 6 - Wed, Dec 9
United Airlines Logo
1:00 pm - 9:00 am
STL
-
BCN
13h 00m
1 stop
United Airlines Logo
6:50 am - 1:45 pm
BCN
-
STL
13h 55m
1 stop
$766United Airlines
Sun, Dec 6 - Wed, Dec 9
Multiple Airlines Logo
7:04 pm - 9:35 am
STL
-
BCN
56h 31m
2 stops
Multiple Airlines Logo
6:50 am - 9:13 pm
BCN
-
STL
21h 23m
2 stops
$785Multiple Airlines
Fri, Oct 30 - Tue, Nov 10
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
$798Multiple Airlines
Sun, Oct 4 - Sun, Oct 18
Multiple Airlines Logo
7:04 pm - 9:35 am
STL
-
BCN
56h 31m
2 stops
Multiple Airlines Logo
1:50 pm - 1:45 pm
BCN
-
STL
30h 55m
1 stop
$800Multiple Airlines
Fri, Oct 30 - Tue, Nov 10
Multiple Airlines Logo
3:30 pm - 1:05 pm
STL
-
BCN
14h 35m
1 stop
Multiple Airlines Logo
12:15 pm - 6:41 pm
BCN
-
STL
13h 26m
1 stop
$820Multiple Airlines
Fri, Oct 2 - Fri, Oct 9
American Airlines Logo
7:29 am - 9:35 am
STL
-
BCN
20h 06m
1 stop
American Airlines Logo
11:00 am - 10:32 pm
BCN
-
STL
18h 32m
1 stop
$823American Airlines
Fri, Oct 30 - Tue, Nov 10
Multiple Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Multiple Airlines Logo
1:15 pm - 2:00 pm
BCN
-
STL
31h 45m
1 stop
$826Multiple Airlines
Sun, Sep 20 - Sun, Sep 27
Air Canada Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Air Canada Logo
12:00 pm - 2:00 pm
BCN
-
STL
33h 00m
1 stop
$827Air Canada
Sun, Aug 23 - Tue, Sep 8

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Air Canada flights from St. Louis to Barcelona

Our best Air Canada deals on St. Louis to Barcelona flight tickets
Air Canada
Dec 6
STL7:33 amLambert-St Louis
19h 02m
2 stops
BCN9:35 amBarcelona-El Prat
Dec 9
BCN1:35 pmBarcelona-El Prat
31h 55m
2 stops
STL2:30 pmLambert-St Louis
$756
Air Canada
Aug 23
STL12:10 pmLambert-St Louis
12h 50m
1 stop
BCN8:00 amBarcelona-El Prat
Sep 8
BCN12:00 pmBarcelona-El Prat
33h 00m
1 stop
STL2:00 pmLambert-St Louis
$827
Air Canada
Sep 24
STL12:10 pmLambert-St Louis
12h 50m
1 stop
BCN8:00 amBarcelona-El Prat
Sep 30
BCN12:15 pmBarcelona-El Prat
30h 58m
2 stops
STL12:13 pmLambert-St Louis
$831

Iberia flights from St. Louis to Barcelona

Our best Iberia deals on St. Louis to Barcelona flight tickets
Iberia
Oct 15
STL5:27 pmLambert-St Louis
19h 08m
2 stops
BCN7:35 pmBarcelona-El Prat
Oct 26
BCN3:05 pmBarcelona-El Prat
38h 53m
2 stops
STL11:58 pmLambert-St Louis
$841
Iberia
Jul 18
STL2:35 pmLambert-St Louis
13h 20m
1 stop
BCN10:55 amBarcelona-El Prat
Jul 20
BCN2:50 pmBarcelona-El Prat
40h 08m
2 stops
STL11:58 pmLambert-St Louis
$1,778

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 July 17, 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

Sun 12/6

1:00 pm-9:00 am

1 stop13h 00m

Barcelona-El Prat

Wed 12/9

1:35 pm-3:41 pm

2 stops33h 06m

$753

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 12/6

7:33 am-9:35 am

2 stops19h 02m

Barcelona-El Prat

Wed 12/9

1:35 pm-2:30 pm

2 stops31h 55m

$756

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 12/6

1:00 pm-9:00 am

1 stop13h 00m

Barcelona-El Prat

Wed 12/9

6:50 am-1:45 pm

1 stop13h 55m

$766

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/30

7:04 pm-9:35 am

2 stops56h 31m

Barcelona-El Prat

Tue 11/10

6:50 am-9:13 pm

2 stops21h 23m

$785
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 10/4

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Sun 10/18

6:40 am-1:25 pm

1 stop13h 45m

$798

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/30

7:04 pm-9:35 am

2 stops56h 31m

Barcelona-El Prat

Tue 11/10

1:50 pm-1:45 pm

1 stop30h 55m

$800

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/2

3:30 pm-1:05 pm

1 stop14h 35m

Barcelona-El Prat

Fri 10/9

12:15 pm-6:41 pm

1 stop13h 26m

$820

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/30

7:29 am-9:35 am

1 stop20h 06m

Barcelona-El Prat

Tue 11/10

11:00 am-10:32 pm

1 stop18h 32m

$823

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Sun 9/27

1:15 pm-2:00 pm

1 stop31h 45m

$826

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 8/23

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Tue 9/8

12:00 pm-2:00 pm

1 stop33h 00m

$827

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 $868 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 40m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 11h 40m
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 40m.

  • 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
8,140 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
8,121 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.8
8,473 reviews
Search Delta flights
Air CanadaPriceFrom $560Free CancellationRating
7.1
11,347 reviews
Search Air Canada flights
United AirlinesPriceFrom $618Free CancellationRating
7.4
9,997 reviews
Search United Airlines flights
American AirlinesPriceFrom $629Free CancellationRating
7.1
11,816 reviews
Search American Airlines flights
IberiaPriceFrom $637Free CancellationRating
7.0
3,257 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