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Cheap flights from St. Louis to Barcelona from $316

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 10/15. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Barcelona

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
4:05 pm - 9:35 am
STL
-
BCN
34h 30m
2 stops
Air Canada Logo
1:35 pm - 3:26 pm
BCN
-
STL
32h 51m
2 stops
$736Air Canada
Sat, Nov 7 - Fri, Nov 13
Air Canada Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Air Canada Logo
1:15 pm - 2:00 pm
BCN
-
STL
31h 45m
1 stop
$745Air Canada
Sun, Sep 20 - Tue, Oct 6
Iberia Logo
8:29 am - 7:35 am
STL
-
BCN
16h 06m
1 stop
Iberia Logo
10:40 am - 9:59 pm
BCN
-
STL
18h 19m
1 stop
$749Iberia
Mon, Nov 9 - Wed, Nov 18
Lufthansa Logo
6:50 pm - 5:35 pm
STL
-
BCN
15h 45m
2 stops
Lufthansa Logo
6:50 am - 1:45 pm
BCN
-
STL
13h 55m
1 stop
$754Lufthansa
Mon, Nov 9 - Wed, Nov 18
United Airlines Logo
6:30 am - 9:35 am
STL
-
BCN
20h 05m
2 stops
United Airlines Logo
1:35 pm - 4:56 pm
BCN
-
STL
34h 21m
2 stops
$756United Airlines
Sun, Jan 24 - Fri, Jan 29
United Airlines Logo
6:30 am - 9:35 am
STL
-
BCN
20h 05m
2 stops
United Airlines Logo
1:35 pm - 12:40 pm
BCN
-
STL
30h 05m
2 stops
$756United Airlines
Sun, Jan 24 - Fri, Jan 29
Iberia Logo
9:50 am - 12:45 pm
STL
-
BCN
19h 55m
2 stops
Iberia Logo
1:35 pm - 9:30 am
BCN
-
STL
26h 55m
2 stops
$768Iberia
Mon, Nov 9 - Wed, Nov 18
Lufthansa Logo
11:45 am - 8:20 am
STL
-
BCN
13h 35m
1 stop
Lufthansa Logo
6:50 am - 1:45 pm
BCN
-
STL
13h 55m
1 stop
$771Lufthansa
Sun, Jan 24 - Fri, Jan 29
Multiple Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Multiple Airlines Logo
1:15 pm - 2:00 pm
BCN
-
STL
31h 45m
1 stop
$774Multiple Airlines
Wed, Sep 23 - Tue, Sep 29
Multiple Airlines Logo
9:44 am - 9:35 am
STL
-
BCN
40h 51m
2 stops
Multiple Airlines Logo
6:50 am - 1:45 pm
BCN
-
STL
13h 55m
1 stop
$774Multiple Airlines
Sat, Nov 7 - Fri, Nov 13

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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
Jan 24
STL6:30 amLambert-St Louis
20h 05m
2 stops
BCN9:35 amBarcelona-El Prat
Jan 29
BCN1:35 pmBarcelona-El Prat
34h 21m
2 stops
STL4:56 pmLambert-St Louis
$756
United Airlines
Jan 24
STL11:45 amLambert-St Louis
13h 35m
1 stop
BCN8:20 amBarcelona-El Prat
Jan 29
BCN1:35 pmBarcelona-El Prat
28h 34m
2 stops
STL11:09 amLambert-St Louis
$758
United Airlines
Nov 7
STL6:50 pmLambert-St Louis
31h 10m
2 stops
BCN9:00 amBarcelona-El Prat
Nov 13
BCN1:35 pmBarcelona-El Prat
39h 17m
2 stops
STL9:52 pmLambert-St Louis
$762

Air Canada flights from St. Louis to Barcelona

Our best Air Canada deals on St. Louis to Barcelona flight tickets
Air Canada
Nov 7
STL4:05 pmLambert-St Louis
34h 30m
2 stops
BCN9:35 amBarcelona-El Prat
Nov 13
BCN1:35 pmBarcelona-El Prat
32h 51m
2 stops
STL3:26 pmLambert-St Louis
$736
Air Canada
Sep 20
STL12:10 pmLambert-St Louis
12h 50m
1 stop
BCN8:00 amBarcelona-El Prat
Oct 6
BCN1:15 pmBarcelona-El Prat
31h 45m
1 stop
STL2:00 pmLambert-St Louis
$745
Air Canada
Dec 6
STL7:33 amLambert-St Louis
19h 02m
2 stops
BCN9:35 amBarcelona-El Prat
Dec 9
BCN1:35 pmBarcelona-El Prat
31h 55m
2 stops
STL2:30 pmLambert-St Louis
$761

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 July 29, 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

Sat 11/7

4:05 pm-9:35 am

2 stops34h 30m

Barcelona-El Prat

Fri 11/13

1:35 pm-3:26 pm

2 stops32h 51m

$736

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Tue 10/6

1:15 pm-2:00 pm

1 stop31h 45m

$745

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/9

8:29 am-7:35 am

1 stop16h 06m

Barcelona-El Prat

Wed 11/18

10:40 am-9:59 pm

1 stop18h 19m

$749

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/9

6:50 pm-5:35 pm

2 stops15h 45m

Barcelona-El Prat

Wed 11/18

6:50 am-1:45 pm

1 stop13h 55m

$754

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 1/24

6:30 am-9:35 am

2 stops20h 05m

Barcelona-El Prat

Fri 1/29

1:35 pm-4:56 pm

2 stops34h 21m

$756

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 1/24

6:30 am-9:35 am

2 stops20h 05m

Barcelona-El Prat

Fri 1/29

1:35 pm-12:40 pm

2 stops30h 05m

$756

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/9

9:50 am-12:45 pm

2 stops19h 55m

Barcelona-El Prat

Wed 11/18

1:35 pm-9:30 am

2 stops26h 55m

$768
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 1/24

11:45 am-8:20 am

1 stop13h 35m

Barcelona-El Prat

Fri 1/29

6:50 am-1:45 pm

1 stop13h 55m

$771

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 9/23

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Tue 9/29

1:15 pm-2:00 pm

1 stop31h 45m

$774

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 11/7

9:44 am-9:35 am

2 stops40h 51m

Barcelona-El Prat

Fri 11/13

6:50 am-1:45 pm

1 stop13h 55m

$774

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

Prices are currently low for flights on this route.

Typical prices usually range from $777 to $1,385.
The lowest price recently found on this route was $736.

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 $558. 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 from St. Louis 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 $896 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 $557 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 10m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 11h 10m
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 10m.

  • 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
8,163 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
8,127 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.8
8,486 reviews
Search Delta flights
Air CanadaPriceFrom $624Free CancellationRating
7.1
11,406 reviews
Search Air Canada flights
American AirlinesPriceFrom $629Free CancellationRating
7.1
11,840 reviews
Search American Airlines flights
United AirlinesPriceFrom $634Free CancellationRating
7.4
10,051 reviews
Search United Airlines flights
IberiaPriceFrom $637Free CancellationRating
7.0
3,260 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