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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.
Multiple Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Multiple Airlines Logo
6:40 am - 1:25 pm
BCN
-
STL
13h 45m
1 stop
$765Multiple Airlines
Mon, Sep 21 - Tue, Sep 29
British Airways Logo
6:06 am - 10:35 am
STL
-
BCN
21h 29m
1 stop
British Airways Logo
10:45 am - 10:00 pm
BCN
-
STL
18h 15m
1 stop
$768British Airways
Mon, Sep 21 - Tue, Sep 29
Iberia Logo
8:07 pm - 5:35 pm
STL
-
BCN
14h 28m
2 stops
Iberia Logo
6:30 pm - 9:16 am
BCN
-
STL
21h 46m
1 stop
$769Iberia
Mon, Sep 21 - Tue, Sep 29
Air Canada Logo
5:32 pm - 9:20 am
STL
-
BCN
32h 48m
2 stops
Air Canada Logo
12:15 pm - 8:37 am
BCN
-
STL
27h 22m
2 stops
$805Air Canada
Mon, Sep 21 - Tue, Sep 29
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
$811Lufthansa
Sun, Sep 20 - Sun, Sep 27
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
Sun, Sep 20 - Sun, Sep 27
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
$820Lufthansa
Sun, Sep 20 - Sun, Sep 27
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
Sun, Sep 20 - Sun, Sep 27
Air Canada Logo
5:32 pm - 8:00 am
STL
-
BCN
31h 28m
2 stops
Air Canada Logo
1:15 pm - 8:37 am
BCN
-
STL
26h 22m
2 stops
$855Air Canada
Sun, Sep 20 - Sun, Sep 27
Multiple Airlines Logo
5:00 am - 8:00 am
STL
-
BCN
20h 00m
2 stops
Multiple Airlines Logo
6:40 am - 3:38 pm
BCN
-
STL
15h 58m
2 stops
$861Multiple Airlines
Sun, Sep 20 - Sun, Sep 27

Lufthansa flights from St. Louis to Barcelona

Our best Lufthansa deals on St. Louis to Barcelona flight tickets
Lufthansa
Sep 20
STL3:30 pmLambert-St Louis
19h 45m
1 stop
BCN6:15 pmBarcelona-El Prat
Sep 27
BCN6:40 amBarcelona-El Prat
13h 45m
1 stop
STL1:25 pmLambert-St Louis
$811
Lufthansa
Sep 20
STL3:30 pmLambert-St Louis
19h 45m
1 stop
BCN6:15 pmBarcelona-El Prat
Sep 27
BCN6:40 amBarcelona-El Prat
13h 45m
1 stop
STL1:25 pmLambert-St Louis
$812
Lufthansa
Sep 20
STL3:30 pmLambert-St Louis
19h 45m
1 stop
BCN6:15 pmBarcelona-El Prat
Sep 27
BCN6:40 amBarcelona-El Prat
15h 58m
2 stops
STL3:38 pmLambert-St Louis
$820

Air Canada flights from St. Louis to Barcelona

Our best Air Canada deals on St. Louis to Barcelona flight tickets
Air Canada
Sep 21
STL5:32 pmLambert-St Louis
32h 48m
2 stops
BCN9:20 amBarcelona-El Prat
Sep 29
BCN12:15 pmBarcelona-El Prat
27h 22m
2 stops
STL8:37 amLambert-St Louis
$805
Air Canada
Sep 20
STL5:32 pmLambert-St Louis
31h 28m
2 stops
BCN8:00 amBarcelona-El Prat
Sep 27
BCN1:15 pmBarcelona-El Prat
26h 22m
2 stops
STL8:37 amLambert-St Louis
$855
Air Canada
May 3
STL7:05 amLambert-St Louis
19h 15m
1 stop
BCN9:20 amBarcelona-El Prat
May 19
BCN6:40 amBarcelona-El Prat
20h 45m
2 stops
STL8:25 pmLambert-St Louis
$878

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 2, 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 9/21

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Tue 9/29

6:40 am-1:25 pm

1 stop13h 45m

$765

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/21

6:06 am-10:35 am

1 stop21h 29m

Barcelona-El Prat

Tue 9/29

10:45 am-10:00 pm

1 stop18h 15m

$768

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/21

8:07 pm-5:35 pm

2 stops14h 28m

Barcelona-El Prat

Tue 9/29

6:30 pm-9:16 am

1 stop21h 46m

$769

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/21

5:32 pm-9:20 am

2 stops32h 48m

Barcelona-El Prat

Tue 9/29

12:15 pm-8:37 am

2 stops27h 22m

$805

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

3:30 pm-6:15 pm

1 stop19h 45m

Barcelona-El Prat

Sun 9/27

6:40 am-1:25 pm

1 stop13h 45m

$811

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

3:30 pm-6:15 pm

1 stop19h 45m

Barcelona-El Prat

Sun 9/27

6:40 am-1:25 pm

1 stop13h 45m

$812

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

3:30 pm-6:15 pm

1 stop19h 45m

Barcelona-El Prat

Sun 9/27

6:40 am-3:38 pm

2 stops15h 58m

$820

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

3:30 pm-6:15 pm

1 stop19h 45m

Barcelona-El Prat

Sun 9/27

6:40 am-3:38 pm

2 stops15h 58m

$821

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

5:32 pm-8:00 am

2 stops31h 28m

Barcelona-El Prat

Sun 9/27

1:15 pm-8:37 am

2 stops26h 22m

$855

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

5:00 am-8:00 am

2 stops20h 00m

Barcelona-El Prat

Sun 9/27

6:40 am-3:38 pm

2 stops15h 58m

$861

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 $663.

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 $861 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

11h 25m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 11h 25m
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 25m.

  • 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
7,883 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
7,841 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,370 reviews
Search Delta flights
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,533 reviews
Search United Airlines flights
Air CanadaPriceFrom $576Free CancellationRating
7.1
10,881 reviews
Search Air Canada flights
American AirlinesPriceFrom $607Free CancellationRating
7.1
11,550 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,164 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