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Cheap flights from St. Louis to Barcelona from $352

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 10/25. 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
0 bags

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Find the cheapest flights from St. Louis to Barcelona

Cheap round-trip flights

Enter your travel dates to find the best prices.
Finnair Logo
4:32 pm - 10:35 am
STL
-
BCN
11h 03m
1 stop
Finnair Logo
10:40 am - 7:46 pm
BCN
-
STL
15h 06m
1 stop
$755Finnair
Mon, Oct 12 - Wed, Oct 28
American Airlines Logo
9:38 am - 6:45 am
STL
-
BCN
14h 07m
2 stops
American Airlines Logo
10:40 am - 10:00 pm
BCN
-
STL
17h 20m
1 stop
$778American Airlines
Mon, Oct 12 - Wed, Oct 28
British Airways Logo
6:51 pm - 10:10 am
STL
-
BCN
32h 19m
1 stop
British Airways Logo
10:40 am - 9:27 am
BCN
-
STL
28h 47m
1 stop
$785British Airways
Sat, Oct 17 - Fri, Oct 30
Air Canada Logo
8:55 am - 8:00 am
STL
-
BCN
16h 05m
2 stops
Air Canada Logo
12:35 pm - 3:38 pm
BCN
-
STL
33h 03m
2 stops
$791Air Canada
Mon, Oct 12 - Wed, Oct 28
Multiple Airlines Logo
6:49 pm - 8:00 am
STL
-
BCN
30h 11m
2 stops
Multiple Airlines Logo
5:50 am - 2:55 pm
BCN
-
STL
15h 05m
1 stop
$801Multiple Airlines
Sat, Oct 17 - Fri, Oct 30
Iberia Logo
11:18 am - 7:35 am
STL
-
BCN
13h 17m
1 stop
Iberia Logo
8:05 pm - 8:08 pm
BCN
-
STL
31h 03m
2 stops
$810Iberia
Mon, Sep 28 - Mon, Oct 12
Multiple Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Multiple Airlines Logo
7:00 pm - 1:25 pm
BCN
-
STL
25h 25m
1 stop
$816Multiple Airlines
Mon, Sep 28 - Mon, Oct 12
British Airways Logo
9:35 pm - 9:25 am
STL
-
BCN
28h 50m
1 stop
British Airways Logo
8:00 pm - 7:30 pm
BCN
-
STL
30h 30m
1 stop
$823British Airways
Wed, Oct 7 - Sat, Oct 17
Scandinavian Airlines Logo
3:42 pm - 6:10 pm
STL
-
BCN
19h 28m
2 stops
Scandinavian Airlines Logo
7:00 pm - 11:37 pm
BCN
-
STL
35h 37m
2 stops
$829Scandinavian Airlines
Mon, Sep 7 - Thu, Sep 10
United Airlines Logo
7:30 am - 8:00 am
STL
-
BCN
17h 30m
3 stops
United Airlines Logo
12:15 pm - 2:11 pm
BCN
-
STL
32h 56m
2 stops
$837United Airlines
Mon, Sep 28 - Mon, Oct 12

Finnair flights from St. Louis to Barcelona

Our best Finnair deals on St. Louis to Barcelona flight tickets
Finnair
Oct 12
STL4:32 pmLambert-St Louis
11h 03m
1 stop
BCN10:35 amBarcelona-El Prat
Oct 28
BCN10:40 amBarcelona-El Prat
15h 06m
1 stop
STL7:46 pmLambert-St Louis
$755
Finnair
Nov 9
STL1:20 pmLambert-St Louis
12h 30m
1 stop
BCN8:50 amBarcelona-El Prat
Nov 15
BCN10:40 amBarcelona-El Prat
15h 50m
1 stop
STL7:30 pmLambert-St Louis
$814

American Airlines flights from St. Louis to Barcelona

Our best American Airlines deals on St. Louis to Barcelona flight tickets
American Airlines
Oct 12
STL9:38 amLambert-St Louis
14h 07m
2 stops
BCN6:45 amBarcelona-El Prat
Oct 28
BCN10:40 amBarcelona-El Prat
17h 20m
1 stop
STL10:00 pmLambert-St Louis
$778
American Airlines
Nov 9
STL6:00 amLambert-St Louis
20h 10m
1 stop
BCN9:10 amBarcelona-El Prat
Nov 15
BCN11:50 amBarcelona-El Prat
16h 52m
2 stops
STL9:42 pmLambert-St Louis
$828
American Airlines
Jun 1
STL11:04 amLambert-St Louis
16h 06m
1 stop
BCN10:10 amBarcelona-El Prat
Jun 6
BCN10:45 amBarcelona-El Prat
14h 44m
1 stop
STL6:29 pmLambert-St Louis
$1,757

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 May 18, 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
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/12

4:32 pm-10:35 am

1 stop11h 03m

Barcelona-El Prat

Wed 10/28

10:40 am-7:46 pm

1 stop15h 06m

$755

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/12

9:38 am-6:45 am

2 stops14h 07m

Barcelona-El Prat

Wed 10/28

10:40 am-10:00 pm

1 stop17h 20m

$778

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 10/17

6:51 pm-10:10 am

1 stop32h 19m

Barcelona-El Prat

Fri 10/30

10:40 am-9:27 am

1 stop28h 47m

$785

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/12

8:55 am-8:00 am

2 stops16h 05m

Barcelona-El Prat

Wed 10/28

12:35 pm-3:38 pm

2 stops33h 03m

$791

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 10/17

6:49 pm-8:00 am

2 stops30h 11m

Barcelona-El Prat

Fri 10/30

5:50 am-2:55 pm

1 stop15h 05m

$801

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

11:18 am-7:35 am

1 stop13h 17m

Barcelona-El Prat

Mon 10/12

8:05 pm-8:08 pm

2 stops31h 03m

$810

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Mon 10/12

7:00 pm-1:25 pm

1 stop25h 25m

$816

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/7

9:35 pm-9:25 am

1 stop28h 50m

Barcelona-El Prat

Sat 10/17

8:00 pm-7:30 pm

1 stop30h 30m

$823

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/7

3:42 pm-6:10 pm

2 stops19h 28m

Barcelona-El Prat

Thu 9/10

7:00 pm-11:37 pm

2 stops35h 37m

$829

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

7:30 am-8:00 am

3 stops17h 30m

Barcelona-El Prat

Mon 10/12

12:15 pm-2:11 pm

2 stops32h 56m

$837

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 $831 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 $581 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 03m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 11h 03m
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 03m.

  • 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
8,010 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
7,986 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,452 reviews
Search Delta flights
Air CanadaPriceFrom $560Free CancellationRating
7.1
11,062 reviews
Search Air Canada flights
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,731 reviews
Search United Airlines flights
American AirlinesPriceFrom $607Free CancellationRating
7.1
11,646 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,220 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