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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 10/14. 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.
United Airlines Logo
6:30 am - 9:35 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
20h 05m2 stops Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
1:35 pm - 7:40 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
37h 05m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$752United Airlines
Sun, Jan 24 - Fri, Jan 29
United Airlines Logo
6:30 am - 9:35 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
20h 05m2 stops Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
1:35 pm - 6:06 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
35h 31m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$752United Airlines
Sun, Jan 24 - Fri, Jan 29
Air Canada Logo
1:08 pm - 9:35 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
13h 27m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
1:35 pm - 10:32 amBCN  Barcelona-El Prat-STL Lambert-St Louis
27h 57m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$756Air Canada
Sun, Nov 15 - Wed, Nov 18
Air Canada Logo
6:50 pm - 9:35 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
31h 45m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
1:35 pm - 3:43 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
33h 08m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$756Air Canada
Sat, Nov 7 - Fri, Nov 13
Multiple Airlines Logo
12:10 pm - 8:00 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
12h 50m1 stop Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
12:35 pm - 2:30 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
31h 55m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$758Multiple Airlines
Wed, Oct 21 - Wed, Oct 28
Lufthansa Logo
11:45 am - 8:20 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
13h 35m1 stop Newark
Lufthansa Logo
6:50 am - 1:45 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
13h 55m1 stop Frankfurt am Main
$767Lufthansa
Sun, Jan 24 - Fri, Jan 29
Multiple Airlines Logo
5:34 pm - 9:35 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
33h 01m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
5:55 am - 1:45 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
14h 50m1 stop Frankfurt am Main
$769Multiple Airlines
Sat, Nov 7 - Fri, Nov 13
Lufthansa Logo
12:20 pm - 11:55 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
16h 35m2 stops Newark Frankfurt am Main
Lufthansa Logo
8:00 am - 9:09 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
20h 09m2 stops Frankfurt am Main Newark
$790Lufthansa
Tue, Oct 6 - Tue, Oct 13
Iberia Logo
11:55 am - 11:25 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
16h 30m2 stops Dallas/Fort Worth London Heathrow
Iberia Logo
12:00 pm - 10:44 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
17h 44m1 stop Philadelphia
$795Iberia
Sun, Jan 24 - Sat, Jan 30
Iberia Logo
11:55 am - 11:25 amSTL  Lambert-St Louis-BCN Barcelona-El Prat
16h 30m2 stops Dallas/Fort Worth London Heathrow
Iberia Logo
12:00 pm - 10:44 pmBCN  Barcelona-El Prat-STL Lambert-St Louis
17h 44m1 stop Philadelphia
$795Iberia
Sun, Jan 24 - Sat, Jan 30

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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
37h 05m
2 stops
STL7:40 pmLambert-St Louis
$752
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
37h 05m
2 stops
STL7:40 pmLambert-St Louis
$753
United Airlines
Nov 15
STL9:59 amLambert-St Louis
15h 21m
1 stop
BCN8:20 amBarcelona-El Prat
Nov 18
BCN6:50 amBarcelona-El Prat
13h 55m
1 stop
STL1:45 pmLambert-St Louis
$766

Air Canada flights from St. Louis to Barcelona

Our best Air Canada deals on St. Louis to Barcelona flight tickets
Air Canada
Nov 15
STL1:08 pmLambert-St Louis
13h 27m
2 stops
BCN9:35 amBarcelona-El Prat
Nov 18
BCN1:35 pmBarcelona-El Prat
27h 57m
2 stops
STL10:32 amLambert-St Louis
$756
Air Canada
Sep 20
STL2:40 pmLambert-St Louis
11h 40m
1 stop
BCN9:20 amBarcelona-El Prat
Sep 27
BCN1:15 pmBarcelona-El Prat
31h 45m
1 stop
STL2:00 pmLambert-St Louis
$796
Air Canada
Aug 19
STL9:30 amLambert-St Louis
15h 30m
2 stops
BCN8:00 amBarcelona-El Prat
Aug 25
BCN12:15 pmBarcelona-El Prat
30h 47m
2 stops
STL12:02 pmLambert-St Louis
$1,037

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 August 11, 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 Lambert-St Louis - BCN Barcelona-El Prat

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-7:40 pm

2 stops37h 05m

$752

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

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-6:06 pm

2 stops35h 31m

$752

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 11/15

1:08 pm-9:35 am

2 stops13h 27m

Barcelona-El Prat

Wed 11/18

1:35 pm-10:32 am

2 stops27h 57m

$756

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sat 11/7

6:50 pm-9:35 am

2 stops31h 45m

Barcelona-El Prat

Fri 11/13

1:35 pm-3:43 pm

2 stops33h 08m

$756

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Wed 10/21

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 10/28

12:35 pm-2:30 pm

2 stops31h 55m

$758
Quickest round-trip

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

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

$767

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sat 11/7

5:34 pm-9:35 am

2 stops33h 01m

Barcelona-El Prat

Fri 11/13

5:55 am-1:45 pm

1 stop14h 50m

$769

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Tue 10/6

12:20 pm-11:55 am

2 stops16h 35m

Barcelona-El Prat

Tue 10/13

8:00 am-9:09 pm

2 stops20h 09m

$790

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 1/24

11:55 am-11:25 am

2 stops16h 30m

Barcelona-El Prat

Sat 1/30

12:00 pm-10:44 pm

1 stop17h 44m

$795

St. LouisBarcelona

STL Lambert-St Louis - BCN Barcelona-El Prat

STLBCN

Lambert-St Louis

Sun 1/24

11:55 am-11:25 am

2 stops16h 30m

Barcelona-El Prat

Sat 1/30

12:00 pm-10:44 pm

1 stop17h 44m

$795

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $907 to $1,340.
The lowest price recently found on this route was $752.

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 $902 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

12h 50m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 12h 50m
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 12h 50m.

  • 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
8,177 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
8,154 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.8
8,506 reviews
Search Delta flights
Air CanadaPriceFrom $624Free CancellationRating
7.1
11,462 reviews
Search Air Canada flights
American AirlinesPriceFrom $629Free CancellationRating
7.1
11,901 reviews
Search American Airlines flights
United AirlinesPriceFrom $634Free CancellationRating
7.4
10,101 reviews
Search United Airlines flights
IberiaPriceFrom $637Free CancellationRating
7.0
3,263 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