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Cheap flights from St. Louis to Barcelona from $266

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 8/1. 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.
British Airways Logo
4:30 pm - 2:15 pm
STL
-
BCN
14h 45m
2 stops
British Airways Logo
10:30 am - 4:41 pm
BCN
-
STL
13h 11m
1 stop
$573British Airways
Wed, Apr 8 - Wed, Apr 15
Multiple Airlines Logo
11:06 am - 1:00 pm
STL
-
BCN
18h 54m
1 stop
Multiple Airlines Logo
3:30 pm - 10:16 am
BCN
-
STL
25h 46m
1 stop
$577Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
British Airways Logo
12:59 pm - 6:45 am
STL
-
BCN
10h 46m
1 stop
British Airways Logo
10:30 am - 10:19 pm
BCN
-
STL
18h 49m
1 stop
$579British Airways
Tue, Apr 14 - Tue, Apr 28
British Airways Logo
2:33 pm - 1:15 pm
STL
-
BCN
15h 42m
2 stops
British Airways Logo
10:30 am - 7:33 pm
BCN
-
STL
16h 03m
1 stop
$581British Airways
Tue, Apr 14 - Tue, Apr 28
Multiple Airlines Logo
12:04 pm - 9:00 am
STL
-
BCN
13h 56m
2 stops
Multiple Airlines Logo
11:10 am - 8:44 pm
BCN
-
STL
16h 34m
2 stops
$583Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
British Airways Logo
8:03 pm - 10:35 am
STL
-
BCN
31h 32m
1 stop
British Airways Logo
10:30 am - 10:19 pm
BCN
-
STL
18h 49m
1 stop
$584British Airways
Tue, Apr 7 - Tue, Apr 28
British Airways Logo
9:34 am - 7:35 am
STL
-
BCN
15h 01m
1 stop
British Airways Logo
3:10 pm - 7:30 pm
BCN
-
STL
35h 20m
1 stop
$585British Airways
Mon, Apr 13 - Mon, Apr 20
United Airlines Logo
6:40 pm - 8:00 am
STL
-
BCN
30h 20m
2 stops
United Airlines Logo
12:15 pm - 9:08 pm
BCN
-
STL
39h 53m
2 stops
$587United Airlines
Tue, Apr 7 - Tue, Apr 28
United Airlines Logo
6:30 am - 8:20 am
STL
-
BCN
18h 50m
2 stops
United Airlines Logo
12:15 pm - 9:13 pm
BCN
-
STL
39h 58m
2 stops
$588United Airlines
Tue, Apr 14 - Tue, Apr 28
United Airlines Logo
7:45 am - 1:15 pm
STL
-
BCN
22h 30m
1 stop
United Airlines Logo
1:15 pm - 3:24 pm
BCN
-
STL
33h 09m
1 stop
$589United Airlines
Tue, Apr 14 - Tue, Apr 28

British Airways flights from St. Louis to Barcelona

Our best British Airways deals on St. Louis to Barcelona flight tickets
British Airways
Apr 8
STL4:30 pmLambert-St Louis
14h 45m
2 stops
BCN2:15 pmBarcelona-El Prat
Apr 15
BCN10:30 amBarcelona-El Prat
13h 11m
1 stop
STL4:41 pmLambert-St Louis
$573
British Airways
Apr 14
STL12:59 pmLambert-St Louis
10h 46m
1 stop
BCN6:45 amBarcelona-El Prat
Apr 28
BCN10:30 amBarcelona-El Prat
18h 49m
1 stop
STL10:19 pmLambert-St Louis
$579
British Airways
Apr 14
STL2:33 pmLambert-St Louis
15h 42m
2 stops
BCN1:15 pmBarcelona-El Prat
Apr 28
BCN10:30 amBarcelona-El Prat
16h 03m
1 stop
STL7:33 pmLambert-St Louis
$581

American Airlines flights from St. Louis to Barcelona

Our best American Airlines deals on St. Louis to Barcelona flight tickets
American Airlines
Apr 13
STL5:49 pmLambert-St Louis
11h 21m
1 stop
BCN12:10 pmBarcelona-El Prat
Apr 27
BCN10:30 amBarcelona-El Prat
20h 16m
1 stop
STL11:46 pmLambert-St Louis
$634
American Airlines
Mar 1
STL10:37 amLambert-St Louis
15h 23m
2 stops
BCN9:00 amBarcelona-El Prat
Mar 3
BCN11:00 amBarcelona-El Prat
19h 56m
1 stop
STL11:56 pmLambert-St Louis
$1,000
American Airlines
Mar 6
STL11:22 amLambert-St Louis
18h 43m
1 stop
BCN1:05 pmBarcelona-El Prat
Mar 26
BCN6:10 pmBarcelona-El Prat
23h 19m
1 stop
STL11:29 amLambert-St Louis
$1,377

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 27, 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

Wed 4/8

4:30 pm-2:15 pm

2 stops14h 45m

Barcelona-El Prat

Wed 4/15

10:30 am-4:41 pm

1 stop13h 11m

$573

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 4/8

11:06 am-1:00 pm

1 stop18h 54m

Barcelona-El Prat

Wed 4/15

3:30 pm-10:16 am

1 stop25h 46m

$577

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

12:59 pm-6:45 am

1 stop10h 46m

Barcelona-El Prat

Tue 4/28

10:30 am-10:19 pm

1 stop18h 49m

$579

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

2:33 pm-1:15 pm

2 stops15h 42m

Barcelona-El Prat

Tue 4/28

10:30 am-7:33 pm

1 stop16h 03m

$581

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 4/8

12:04 pm-9:00 am

2 stops13h 56m

Barcelona-El Prat

Wed 4/15

11:10 am-8:44 pm

2 stops16h 34m

$583

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/7

8:03 pm-10:35 am

1 stop31h 32m

Barcelona-El Prat

Tue 4/28

10:30 am-10:19 pm

1 stop18h 49m

$584

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

9:34 am-7:35 am

1 stop15h 01m

Barcelona-El Prat

Mon 4/20

3:10 pm-7:30 pm

1 stop35h 20m

$585

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/7

6:40 pm-8:00 am

2 stops30h 20m

Barcelona-El Prat

Tue 4/28

12:15 pm-9:08 pm

2 stops39h 53m

$587

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

6:30 am-8:20 am

2 stops18h 50m

Barcelona-El Prat

Tue 4/28

12:15 pm-9:13 pm

2 stops39h 58m

$588

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

7:45 am-1:15 pm

1 stop22h 30m

Barcelona-El Prat

Tue 4/28

1:15 pm-3:24 pm

1 stop33h 09m

$589

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 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 $849 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

13h 05m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 13h 05m
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 13h 05m.

  • 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
7,817 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
7,772 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,239 reviews
Search Delta flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,360 reviews
Search United Airlines flights
Air CanadaPriceFrom $593Free CancellationRating
7.1
10,757 reviews
Search Air Canada flights
American AirlinesPriceFrom $629Free CancellationRating
7.1
11,368 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,127 reviews
Search Iberia flights
KLMPriceFrom $634Free CancellationRating
7.7
1,461 reviews
Search KLM 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