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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 9/20. 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.
Multiple Airlines Logo
9:40 pm - 7:35 pm
STL
-
BCN
14h 55m
1 stop
Multiple Airlines Logo
12:20 pm - 11:25 pm
BCN
-
STL
18h 05m
1 stop
$752Multiple Airlines
Sun, Oct 11 - Thu, Oct 15
British Airways Logo
10:14 am - 10:10 am
STL
-
BCN
16h 56m
1 stop
British Airways Logo
3:10 pm - 7:30 pm
BCN
-
STL
35h 20m
1 stop
$775British Airways
Mon, Oct 12 - Mon, Oct 19
Iberia Logo
9:40 pm - 7:35 pm
STL
-
BCN
14h 55m
1 stop
Iberia Logo
12:30 pm - 11:41 pm
BCN
-
STL
18h 11m
2 stops
$777Iberia
Sun, Oct 11 - Thu, Oct 15
Delta Logo
2:18 pm - 2:50 pm
STL
-
BCN
17h 32m
2 stops
Delta Logo
6:10 am - 5:06 pm
BCN
-
STL
17h 56m
2 stops
$791Delta
Sun, Oct 11 - Thu, Oct 15
Iberia Logo
4:32 pm - 10:35 am
STL
-
BCN
11h 03m
1 stop
Iberia Logo
9:10 pm - 8:08 pm
BCN
-
STL
29h 58m
2 stops
$796Iberia
Mon, Oct 12 - Mon, Oct 19
Iberia Logo
9:35 pm - 10:40 pm
STL
-
BCN
18h 05m
1 stop
Iberia Logo
7:30 am - 7:30 pm
BCN
-
STL
19h 00m
1 stop
$807Iberia
Wed, Oct 7 - Sun, Oct 18
Iberia Logo
9:35 pm - 10:40 pm
STL
-
BCN
18h 05m
1 stop
Iberia Logo
7:20 pm - 9:04 am
BCN
-
STL
20h 44m
1 stop
$816Iberia
Wed, Oct 7 - Sun, Oct 18
United Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
United Airlines Logo
1:50 pm - 1:25 pm
BCN
-
STL
30h 35m
1 stop
$817United Airlines
Mon, Oct 12 - Mon, Oct 19
British Airways Logo
10:14 am - 10:10 am
STL
-
BCN
16h 56m
1 stop
British Airways Logo
10:45 am - 10:00 pm
BCN
-
STL
18h 15m
1 stop
$819British Airways
Thu, Sep 24 - Wed, Sep 30
Multiple Airlines Logo
9:40 pm - 8:20 pm
STL
-
BCN
15h 40m
1 stop
Multiple Airlines Logo
3:35 pm - 1:22 pm
BCN
-
STL
28h 47m
1 stop
$823Multiple Airlines
Sun, Sep 20 - Sun, Sep 27

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United Airlines flights from St. Louis to Barcelona

Our best United Airlines deals on St. Louis to Barcelona flight tickets
United Airlines
Oct 12
STL12:10 pmLambert-St Louis
12h 50m
1 stop
BCN8:00 amBarcelona-El Prat
Oct 19
BCN1:50 pmBarcelona-El Prat
30h 35m
1 stop
STL1:25 pmLambert-St Louis
$817
United Airlines
Oct 12
STL5:18 pmLambert-St Louis
31h 42m
2 stops
BCN8:00 amBarcelona-El Prat
Oct 19
BCN1:15 pmBarcelona-El Prat
32h 03m
2 stops
STL2:18 pmLambert-St Louis
$847
United Airlines
Oct 7
STL11:45 amLambert-St Louis
19h 40m
2 stops
BCN2:25 pmBarcelona-El Prat
Oct 17
BCN6:00 amBarcelona-El Prat
17h 26m
2 stops
STL4:26 pmLambert-St Louis
$867

British Airways flights from St. Louis to Barcelona

Our best British Airways deals on St. Louis to Barcelona flight tickets
British Airways
Oct 12
STL10:14 amLambert-St Louis
16h 56m
1 stop
BCN10:10 amBarcelona-El Prat
Oct 19
BCN3:10 pmBarcelona-El Prat
35h 20m
1 stop
STL7:30 pmLambert-St Louis
$775
British Airways
Sep 24
STL10:14 amLambert-St Louis
16h 56m
1 stop
BCN10:10 amBarcelona-El Prat
Sep 30
BCN10:45 amBarcelona-El Prat
18h 15m
1 stop
STL10:00 pmLambert-St Louis
$819
British Airways
Oct 7
STL9:35 pmLambert-St Louis
18h 05m
1 stop
BCN10:40 pmBarcelona-El Prat
Oct 17
BCN8:00 pmBarcelona-El Prat
30h 30m
1 stop
STL7:30 pmLambert-St Louis
$833

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 18, 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

Sun 10/11

9:40 pm-7:35 pm

1 stop14h 55m

Barcelona-El Prat

Thu 10/15

12:20 pm-11:25 pm

1 stop18h 05m

$752

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/12

10:14 am-10:10 am

1 stop16h 56m

Barcelona-El Prat

Mon 10/19

3:10 pm-7:30 pm

1 stop35h 20m

$775

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 10/11

9:40 pm-7:35 pm

1 stop14h 55m

Barcelona-El Prat

Thu 10/15

12:30 pm-11:41 pm

2 stops18h 11m

$777

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 10/11

2:18 pm-2:50 pm

2 stops17h 32m

Barcelona-El Prat

Thu 10/15

6:10 am-5:06 pm

2 stops17h 56m

$791

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/12

4:32 pm-10:35 am

1 stop11h 03m

Barcelona-El Prat

Mon 10/19

9:10 pm-8:08 pm

2 stops29h 58m

$796

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/7

9:35 pm-10:40 pm

1 stop18h 05m

Barcelona-El Prat

Sun 10/18

7:30 am-7:30 pm

1 stop19h 00m

$807

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/7

9:35 pm-10:40 pm

1 stop18h 05m

Barcelona-El Prat

Sun 10/18

7:20 pm-9:04 am

1 stop20h 44m

$816

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 10/12

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Mon 10/19

1:50 pm-1:25 pm

1 stop30h 35m

$817

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 9/24

10:14 am-10:10 am

1 stop16h 56m

Barcelona-El Prat

Wed 9/30

10:45 am-10:00 pm

1 stop18h 15m

$819

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

9:40 pm-8:20 pm

1 stop15h 40m

Barcelona-El Prat

Sun 9/27

3:35 pm-1:22 pm

1 stop28h 47m

$823

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 $824 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

10h 55m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 10h 55m
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 10h 55m.

  • 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
7,930 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
7,891 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,423 reviews
Search Delta flights
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,603 reviews
Search United Airlines flights
Air CanadaPriceFrom $576Free CancellationRating
7.1
10,936 reviews
Search Air Canada flights
American AirlinesPriceFrom $607Free CancellationRating
7.1
11,610 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,182 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