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Cheap flights from St. Louis to Barcelona from $351

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 7/29. 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

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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
9:40 pm - 8:20 pm
STL
-
BCN
15h 40m
1 stop
British Airways Logo
7:40 am - 7:30 pm
BCN
-
STL
18h 50m
1 stop
$771British Airways
Sun, Oct 4 - Wed, Oct 14
British Airways Logo
6:06 am - 10:35 am
STL
-
BCN
21h 29m
1 stop
British Airways Logo
5:10 pm - 7:30 pm
BCN
-
STL
33h 20m
1 stop
$774British Airways
Mon, Sep 28 - Mon, Oct 12
Scandinavian Airlines Logo
1:30 pm - 6:10 pm
STL
-
BCN
21h 40m
2 stops
Scandinavian Airlines Logo
7:00 pm - 11:37 pm
BCN
-
STL
35h 37m
2 stops
$775Scandinavian Airlines
Sat, Aug 29 - Sat, Sep 5
British Airways Logo
9:35 pm - 6:40 pm
STL
-
BCN
14h 05m
1 stop
British Airways Logo
7:40 am - 7:30 pm
BCN
-
STL
18h 50m
1 stop
$786British Airways
Tue, Sep 29 - Tue, Oct 13
British Airways Logo
2:45 pm - 4:25 pm
STL
-
BCN
18h 40m
2 stops
British Airways Logo
9:20 pm - 7:30 pm
BCN
-
STL
29h 10m
1 stop
$793British Airways
Mon, Sep 28 - Mon, Oct 12
Lufthansa Logo
6:49 pm - 7:45 pm
STL
-
BCN
17h 56m
2 stops
Lufthansa Logo
6:40 pm - 1:25 pm
BCN
-
STL
25h 45m
2 stops
$800Lufthansa
Mon, Sep 28 - Mon, Oct 12
British Airways Logo
9:35 pm - 8:15 pm
STL
-
BCN
15h 40m
1 stop
British Airways Logo
7:40 am - 7:30 pm
BCN
-
STL
18h 50m
1 stop
$807British Airways
Fri, Oct 2 - Tue, Oct 13
Lufthansa Logo
3:30 pm - 6:15 pm
STL
-
BCN
19h 45m
1 stop
Lufthansa Logo
6:40 am - 1:25 pm
BCN
-
STL
13h 45m
1 stop
$812Lufthansa
Fri, Oct 2 - Tue, Oct 13
Lufthansa Logo
3:30 pm - 6:15 pm
STL
-
BCN
19h 45m
1 stop
Lufthansa Logo
6:40 am - 3:38 pm
BCN
-
STL
15h 58m
2 stops
$821Lufthansa
Fri, Oct 2 - Tue, Oct 13
British Airways Logo
9:35 pm - 8:15 pm
STL
-
BCN
15h 40m
1 stop
British Airways Logo
9:20 pm - 7:30 pm
BCN
-
STL
29h 10m
1 stop
$834British Airways
Fri, Oct 2 - Mon, Oct 12

British Airways flights from St. Louis to Barcelona

Our best British Airways deals on St. Louis to Barcelona flight tickets
British Airways
Sep 30
STL8:30 amLambert-St Louis
18h 40m
1 stop
BCN10:10 amBarcelona-El Prat
Oct 7
BCN12:50 pmBarcelona-El Prat
17h 51m
1 stop
STL11:41 pmLambert-St Louis
$768
British Airways
Oct 4
STL9:40 pmLambert-St Louis
15h 40m
1 stop
BCN8:20 pmBarcelona-El Prat
Oct 14
BCN7:40 amBarcelona-El Prat
18h 50m
1 stop
STL7:30 pmLambert-St Louis
$771
British Airways
Sep 28
STL6:06 amLambert-St Louis
21h 29m
1 stop
BCN10:35 amBarcelona-El Prat
Oct 12
BCN5:10 pmBarcelona-El Prat
33h 20m
1 stop
STL7:30 pmLambert-St Louis
$774

Iberia flights from St. Louis to Barcelona

Our best Iberia deals on St. Louis to Barcelona flight tickets
Iberia
Sep 30
STL8:07 pmLambert-St Louis
14h 13m
2 stops
BCN5:20 pmBarcelona-El Prat
Oct 7
BCN10:45 amBarcelona-El Prat
15h 45m
1 stop
STL7:30 pmLambert-St Louis
$787
Iberia
Apr 23
STL12:27 pmLambert-St Louis
16h 18m
2 stops
BCN11:45 amBarcelona-El Prat
Apr 28
BCN10:45 amBarcelona-El Prat
19h 14m
1 stop
STL10:59 pmLambert-St Louis
$1,016

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 April 9, 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 10/4

9:40 pm-8:20 pm

1 stop15h 40m

Barcelona-El Prat

Wed 10/14

7:40 am-7:30 pm

1 stop18h 50m

$771

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

6:06 am-10:35 am

1 stop21h 29m

Barcelona-El Prat

Mon 10/12

5:10 pm-7:30 pm

1 stop33h 20m

$774

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 8/29

1:30 pm-6:10 pm

2 stops21h 40m

Barcelona-El Prat

Sat 9/5

7:00 pm-11:37 pm

2 stops35h 37m

$775
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/29

9:35 pm-6:40 pm

1 stop14h 05m

Barcelona-El Prat

Tue 10/13

7:40 am-7:30 pm

1 stop18h 50m

$786

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

2:45 pm-4:25 pm

2 stops18h 40m

Barcelona-El Prat

Mon 10/12

9:20 pm-7:30 pm

1 stop29h 10m

$793

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/28

6:49 pm-7:45 pm

2 stops17h 56m

Barcelona-El Prat

Mon 10/12

6:40 pm-1:25 pm

2 stops25h 45m

$800

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/2

9:35 pm-8:15 pm

1 stop15h 40m

Barcelona-El Prat

Tue 10/13

7:40 am-7:30 pm

1 stop18h 50m

$807

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/2

3:30 pm-6:15 pm

1 stop19h 45m

Barcelona-El Prat

Tue 10/13

6:40 am-1:25 pm

1 stop13h 45m

$812

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/2

3:30 pm-6:15 pm

1 stop19h 45m

Barcelona-El Prat

Tue 10/13

6:40 am-3:38 pm

2 stops15h 58m

$821

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 10/2

9:35 pm-8:15 pm

1 stop15h 40m

Barcelona-El Prat

Mon 10/12

9:20 pm-7:30 pm

1 stop29h 10m

$834

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 April to fly from St. Louis, when ticket prices are also cheap, with an average price of $634.

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 $820 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 $715 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 56m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 13h 56m
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 13h 56m.

  • 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
7,901 reviews
Search Lufthansa flights
British AirwaysPriceFrom $511Free CancellationRating
6.7
7,867 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,394 reviews
Search Delta flights
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,560 reviews
Search United Airlines flights
Air CanadaPriceFrom $576Free CancellationRating
7.1
10,913 reviews
Search Air Canada flights
American AirlinesPriceFrom $607Free CancellationRating
7.1
11,562 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,175 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