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Cheap flights from St. Louis to Barcelona from $349

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 7/19. 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.
United Airlines Logo
8:30 am - 8:20 am
STL
-
BCN
16h 50m
1 stop
United Airlines Logo
12:15 pm - 9:52 pm
BCN
-
STL
40h 37m
2 stops
$584United Airlines
Tue, Apr 14 - Tue, Apr 21
Air Canada Logo
4:05 pm - 8:00 am
STL
-
BCN
32h 55m
2 stops
Air Canada Logo
1:15 pm - 3:25 pm
BCN
-
STL
33h 10m
1 stop
$586Air Canada
Tue, Apr 14 - Tue, Apr 21
British Airways Logo
12:27 pm - 10:55 am
STL
-
BCN
15h 28m
1 stop
British Airways Logo
10:30 am - 10:17 pm
BCN
-
STL
18h 47m
1 stop
$587British Airways
Tue, Apr 14 - Wed, Apr 29
United Airlines Logo
9:10 am - 8:20 am
STL
-
BCN
16h 10m
2 stops
United Airlines Logo
12:15 pm - 9:13 pm
BCN
-
STL
39h 58m
2 stops
$588United Airlines
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
7:45 am - 1:15 pm
STL
-
BCN
22h 30m
1 stop
United Airlines Logo
1:15 pm - 3:25 pm
BCN
-
STL
33h 10m
1 stop
$590United Airlines
Sun, Apr 12 - Tue, Apr 28
American Airlines Logo
4:30 pm - 10:55 am
STL
-
BCN
11h 25m
1 stop
American Airlines Logo
10:30 am - 4:41 pm
BCN
-
STL
13h 11m
1 stop
$591American Airlines
Sun, Apr 12 - Tue, Apr 28
British Airways Logo
4:30 pm - 2:15 pm
STL
-
BCN
14h 45m
2 stops
British Airways Logo
12:50 pm - 7:29 pm
BCN
-
STL
13h 39m
1 stop
$592British Airways
Tue, Apr 14 - Wed, Apr 29
United Airlines Logo
6:55 pm - 1:15 pm
STL
-
BCN
11h 20m
1 stop
United Airlines Logo
12:00 pm - 9:13 pm
BCN
-
STL
16h 13m
2 stops
$595United Airlines
Sun, Apr 12 - Tue, Apr 28
British Airways Logo
4:30 pm - 2:15 pm
STL
-
BCN
14h 45m
2 stops
British Airways Logo
10:30 am - 11:46 pm
BCN
-
STL
20h 16m
1 stop
$597British Airways
Sun, Apr 12 - Tue, Apr 28
British Airways Logo
4:30 pm - 10:55 am
STL
-
BCN
11h 25m
1 stop
British Airways Logo
10:30 am - 11:46 pm
BCN
-
STL
20h 16m
1 stop
$599British Airways
Tue, Apr 14 - Tue, Apr 28

United Airlines flights from St. Louis to Barcelona

Our best United Airlines deals on St. Louis to Barcelona flight tickets
United Airlines
Apr 14
STL8:30 amLambert-St Louis
16h 50m
1 stop
BCN8:20 amBarcelona-El Prat
Apr 21
BCN12:15 pmBarcelona-El Prat
40h 37m
2 stops
STL9:52 pmLambert-St Louis
$584
United Airlines
Apr 14
STL9:10 amLambert-St Louis
16h 10m
2 stops
BCN8:20 amBarcelona-El Prat
Apr 21
BCN12:15 pmBarcelona-El Prat
39h 58m
2 stops
STL9:13 pmLambert-St Louis
$588
United Airlines
Apr 12
STL7:45 amLambert-St Louis
22h 30m
1 stop
BCN1:15 pmBarcelona-El Prat
Apr 28
BCN1:15 pmBarcelona-El Prat
33h 10m
1 stop
STL3:25 pmLambert-St Louis
$590

Air Canada flights from St. Louis to Barcelona

Our best Air Canada deals on St. Louis to Barcelona flight tickets
Air Canada
Apr 14
STL4:05 pmLambert-St Louis
32h 55m
2 stops
BCN8:00 amBarcelona-El Prat
Apr 21
BCN1:15 pmBarcelona-El Prat
33h 10m
1 stop
STL3:25 pmLambert-St Louis
$586
Air Canada
Apr 12
STL6:30 amLambert-St Louis
19h 50m
2 stops
BCN9:20 amBarcelona-El Prat
Apr 28
BCN12:15 pmBarcelona-El Prat
27h 10m
2 stops
STL8:25 amLambert-St Louis
$606
Air Canada
Apr 12
STL7:45 amLambert-St Louis
18h 35m
2 stops
BCN9:20 amBarcelona-El Prat
Apr 28
BCN12:15 pmBarcelona-El Prat
39h 58m
2 stops
STL9:13 pmLambert-St Louis
$607

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 March 5, 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

Tue 4/14

8:30 am-8:20 am

1 stop16h 50m

Barcelona-El Prat

Tue 4/21

12:15 pm-9:52 pm

2 stops40h 37m

$584

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

4:05 pm-8:00 am

2 stops32h 55m

Barcelona-El Prat

Tue 4/21

1:15 pm-3:25 pm

1 stop33h 10m

$586

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

12:27 pm-10:55 am

1 stop15h 28m

Barcelona-El Prat

Wed 4/29

10:30 am-10:17 pm

1 stop18h 47m

$587

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

9:10 am-8:20 am

2 stops16h 10m

Barcelona-El Prat

Tue 4/21

12:15 pm-9:13 pm

2 stops39h 58m

$588

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 4/12

7:45 am-1:15 pm

1 stop22h 30m

Barcelona-El Prat

Tue 4/28

1:15 pm-3:25 pm

1 stop33h 10m

$590
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 4/12

4:30 pm-10:55 am

1 stop11h 25m

Barcelona-El Prat

Tue 4/28

10:30 am-4:41 pm

1 stop13h 11m

$591

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

4:30 pm-2:15 pm

2 stops14h 45m

Barcelona-El Prat

Wed 4/29

12:50 pm-7:29 pm

1 stop13h 39m

$592

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 4/12

6:55 pm-1:15 pm

1 stop11h 20m

Barcelona-El Prat

Tue 4/28

12:00 pm-9:13 pm

2 stops16h 13m

$595

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 4/12

4:30 pm-2:15 pm

2 stops14h 45m

Barcelona-El Prat

Tue 4/28

10:30 am-11:46 pm

1 stop20h 16m

$597

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

4:30 pm-10:55 am

1 stop11h 25m

Barcelona-El Prat

Tue 4/28

10:30 am-11:46 pm

1 stop20h 16m

$599

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 January is, on average, the cheapest month to fly to Barcelona from St. Louis, with most prices found around $505. If you don’t want to visit Barcelona in January, then you should wait until November to fly from St. Louis, when ticket prices are also cheap, with an average price of $666.

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 $852 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 $628 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

12h 50m

Direct flights

None
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

  • 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?

  • 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
7,823 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
7,775 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,246 reviews
Search Delta flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,388 reviews
Search United Airlines flights
Air CanadaPriceFrom $593Free CancellationRating
7.1
10,776 reviews
Search Air Canada flights
American AirlinesPriceFrom $629Free CancellationRating
7.1
11,380 reviews
Search American Airlines flights
KLMPriceFrom $634Free CancellationRating
7.7
1,465 reviews
Search KLM flights
IberiaPriceFrom $636Free CancellationRating
7.0
3,132 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