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Cheap flights from St. Louis to Barcelona from $303

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 4/13. 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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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.
British Airways Logo
12:25 pm - 2:15 pm
STL
-
BCN
18h 50m
2 stops
British Airways Logo
3:15 pm - 7:30 pm
BCN
-
STL
35h 15m
1 stop
$482British Airways
Tue, Apr 14 - Tue, Apr 28
British Airways Logo
6:54 pm - 5:35 pm
STL
-
BCN
15h 41m
2 stops
British Airways Logo
8:35 pm - 7:30 pm
BCN
-
STL
29h 55m
2 stops
$486British Airways
Mon, Apr 13 - Mon, Apr 27
British Airways Logo
8:03 pm - 10:35 am
STL
-
BCN
31h 32m
1 stop
British Airways Logo
6:35 pm - 7:30 pm
BCN
-
STL
31h 55m
1 stop
$502British Airways
Tue, Apr 14 - Tue, Apr 28
Delta Logo
6:59 pm - 5:05 pm
STL
-
BCN
16h 06m
2 stops
Delta Logo
12:15 pm - 9:05 am
BCN
-
STL
26h 50m
2 stops
$504Delta
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
4:05 pm - 5:35 pm
STL
-
BCN
19h 30m
2 stops
Multiple Airlines Logo
8:30 pm - 6:00 pm
BCN
-
STL
27h 30m
2 stops
$514Multiple Airlines
Tue, Mar 17 - Tue, Mar 24
British Airways Logo
2:00 pm - 11:10 am
STL
-
BCN
14h 10m
2 stops
British Airways Logo
10:45 am - 10:59 pm
BCN
-
STL
19h 14m
1 stop
$524British Airways
Wed, Mar 4 - Wed, Apr 8
British Airways Logo
11:44 am - 2:15 pm
STL
-
BCN
19h 31m
2 stops
British Airways Logo
9:15 pm - 7:30 pm
BCN
-
STL
29h 15m
1 stop
$532British Airways
Tue, Apr 14 - Sat, Apr 25
British Airways Logo
7:00 am - 8:50 am
STL
-
BCN
18h 50m
1 stop
British Airways Logo
10:45 am - 10:59 pm
BCN
-
STL
19h 14m
1 stop
$533British Airways
Wed, Mar 4 - Wed, Apr 8
British Airways Logo
6:18 pm - 6:25 pm
STL
-
BCN
17h 07m
2 stops
British Airways Logo
10:45 am - 11:48 pm
BCN
-
STL
20h 03m
2 stops
$535British Airways
Wed, Mar 4 - Wed, Apr 8
British Airways Logo
12:25 pm - 2:15 pm
STL
-
BCN
18h 50m
2 stops
British Airways Logo
9:15 pm - 7:27 pm
BCN
-
STL
29h 12m
2 stops
$536British Airways
Tue, Apr 14 - Sat, Apr 25

British Airways flights from St. Louis to Barcelona

Our best British Airways deals on St. Louis to Barcelona flight tickets
British Airways
Apr 14
STL6:11 pmLambert-St Louis
19h 19m
2 stops
BCN8:30 pmBarcelona-El Prat
Apr 28
BCN9:30 pmBarcelona-El Prat
29h 00m
1 stop
STL7:30 pmLambert-St Louis
$482
British Airways
Apr 13
STL6:54 pmLambert-St Louis
15h 41m
2 stops
BCN5:35 pmBarcelona-El Prat
Apr 27
BCN8:35 pmBarcelona-El Prat
29h 55m
2 stops
STL7:30 pmLambert-St Louis
$486
British Airways
Apr 14
STL8:03 pmLambert-St Louis
31h 32m
1 stop
BCN10:35 amBarcelona-El Prat
Apr 28
BCN6:35 pmBarcelona-El Prat
31h 55m
1 stop
STL7:30 pmLambert-St Louis
$502

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 26
BCN6:40 amBarcelona-El Prat
15h 44m
2 stops
STL3:24 pmLambert-St Louis
$547
Air Canada
Apr 17
STL4:05 pmLambert-St Louis
32h 55m
2 stops
BCN8:00 amBarcelona-El Prat
Oct 16
BCN1:15 pmBarcelona-El Prat
13h 45m
1 stop
STL8:00 pmLambert-St Louis
$570
Air Canada
Apr 17
STL4:05 pmLambert-St Louis
32h 55m
2 stops
BCN8:00 amBarcelona-El Prat
Oct 16
BCN1:15 pmBarcelona-El Prat
32h 03m
2 stops
STL2:18 pmLambert-St Louis
$578

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 February 3, 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

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

12:25 pm-2:15 pm

2 stops18h 50m

Barcelona-El Prat

Tue 4/28

3:15 pm-7:30 pm

1 stop35h 15m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

6:54 pm-5:35 pm

2 stops15h 41m

Barcelona-El Prat

Mon 4/27

8:35 pm-7:30 pm

2 stops29h 55m

$486

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

8:03 pm-10:35 am

1 stop31h 32m

Barcelona-El Prat

Tue 4/28

6:35 pm-7:30 pm

1 stop31h 55m

$502

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 3/17

6:59 pm-5:05 pm

2 stops16h 06m

Barcelona-El Prat

Tue 3/24

12:15 pm-9:05 am

2 stops26h 50m

$504

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 3/17

4:05 pm-5:35 pm

2 stops19h 30m

Barcelona-El Prat

Tue 3/24

8:30 pm-6:00 pm

2 stops27h 30m

$514

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 3/4

2:00 pm-11:10 am

2 stops14h 10m

Barcelona-El Prat

Wed 4/8

10:45 am-10:59 pm

1 stop19h 14m

$524

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

11:44 am-2:15 pm

2 stops19h 31m

Barcelona-El Prat

Sat 4/25

9:15 pm-7:30 pm

1 stop29h 15m

$532

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 3/4

7:00 am-8:50 am

1 stop18h 50m

Barcelona-El Prat

Wed 4/8

10:45 am-10:59 pm

1 stop19h 14m

$533

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 3/4

6:18 pm-6:25 pm

2 stops17h 07m

Barcelona-El Prat

Wed 4/8

10:45 am-11:48 pm

2 stops20h 03m

$535

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

12:25 pm-2:15 pm

2 stops18h 50m

Barcelona-El Prat

Sat 4/25

9:15 pm-7:27 pm

2 stops29h 12m

$536

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 February to fly from St. Louis, when ticket prices are also cheap, with an average price of $640.

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 $854 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 $657 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 00m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 12h 00m
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 00m.

  • 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
7,759 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
7,712 reviews
Search British Airways flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
DeltaPriceFrom $585Free CancellationRating
7.9
8,139 reviews
Search Delta flights
KLMPriceFrom $590Free CancellationRating
7.7
1,448 reviews
Search KLM flights
Air CanadaPriceFrom $593Free CancellationRating
7.1
10,685 reviews
Search Air Canada flights
American AirlinesPriceFrom $629Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,103 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