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Cheap flights from St. Louis to Barcelona from $271

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 10/17. 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.
Multiple Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Multiple Airlines Logo
6:50 am - 2:45 pm
BCN
-
STL
13h 55m
1 stop
$735Multiple Airlines
Sun, Oct 18 - Fri, Oct 30
Multiple Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Multiple Airlines Logo
12:15 pm - 6:41 pm
BCN
-
STL
13h 26m
1 stop
$744Multiple Airlines
Sun, Oct 11 - Wed, Oct 21
Multiple Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Multiple Airlines Logo
6:40 am - 6:41 pm
BCN
-
STL
19h 01m
2 stops
$745Multiple Airlines
Tue, Oct 6 - Tue, Oct 13
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
$746Multiple Airlines
Tue, Oct 6 - Tue, Oct 13
Air Canada Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Air Canada Logo
12:15 pm - 2:17 pm
BCN
-
STL
33h 02m
2 stops
$751Air Canada
Sun, Oct 11 - Wed, Oct 21
Lufthansa Logo
1:29 pm - 12:40 pm
STL
-
BCN
16h 11m
2 stops
Lufthansa Logo
6:40 am - 1:25 pm
BCN
-
STL
13h 45m
1 stop
$754Lufthansa
Wed, Oct 7 - Sun, Oct 18
Air Canada Logo
8:00 am - 8:00 am
STL
-
BCN
17h 00m
2 stops
Air Canada Logo
12:15 pm - 2:17 pm
BCN
-
STL
33h 02m
2 stops
$756Air Canada
Tue, Oct 6 - Tue, Oct 13
Multiple Airlines Logo
7:04 pm - 9:35 am
STL
-
BCN
31h 31m
2 stops
Multiple Airlines Logo
6:50 am - 1:45 pm
BCN
-
STL
13h 55m
1 stop
$769Multiple Airlines
Sat, Dec 26 - Wed, Jan 13
Lufthansa Logo
1:29 pm - 12:40 pm
STL
-
BCN
16h 11m
2 stops
Lufthansa Logo
6:40 am - 1:25 pm
BCN
-
STL
13h 45m
1 stop
$775Lufthansa
Wed, Oct 7 - Sun, Oct 18
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
$776Multiple Airlines
Sun, Sep 20 - Tue, Sep 29

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Lufthansa flights from St. Louis to Barcelona

Our best Lufthansa deals on St. Louis to Barcelona flight tickets
Lufthansa
Oct 7
STL1:29 pmLambert-St Louis
16h 11m
2 stops
BCN12:40 pmBarcelona-El Prat
Oct 18
BCN6:40 amBarcelona-El Prat
13h 45m
1 stop
STL1:25 pmLambert-St Louis
$754
Lufthansa
Oct 7
STL1:29 pmLambert-St Louis
16h 11m
2 stops
BCN12:40 pmBarcelona-El Prat
Oct 18
BCN6:40 amBarcelona-El Prat
13h 45m
1 stop
STL1:25 pmLambert-St Louis
$775
Lufthansa
Oct 7
STL1:29 pmLambert-St Louis
16h 11m
2 stops
BCN12:40 pmBarcelona-El Prat
Oct 17
BCN7:00 pmBarcelona-El Prat
25h 25m
1 stop
STL1:25 pmLambert-St Louis
$780

United Airlines flights from St. Louis to Barcelona

Our best United Airlines deals on St. Louis to Barcelona flight tickets
United Airlines
Oct 18
STL7:30 amLambert-St Louis
17h 30m
2 stops
BCN8:00 amBarcelona-El Prat
Oct 30
BCN9:55 amBarcelona-El Prat
30h 46m
2 stops
STL10:41 amLambert-St Louis
$779
United Airlines
Nov 25
STL8:40 amLambert-St Louis
17h 20m
1 stop
BCN9:00 amBarcelona-El Prat
Dec 5
BCN1:35 pmBarcelona-El Prat
33h 06m
2 stops
STL3:41 pmLambert-St Louis
$803
United Airlines
Nov 25
STL11:25 amLambert-St Louis
18h 50m
1 stop
BCN1:15 pmBarcelona-El Prat
Dec 6
BCN6:50 amBarcelona-El Prat
13h 55m
1 stop
STL1:45 pmLambert-St Louis
$816

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 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

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 10/18

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Fri 10/30

6:50 am-2:45 pm

1 stop13h 55m

$735
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 10/11

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 10/21

12:15 pm-6:41 pm

1 stop13h 26m

$744

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/6

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Tue 10/13

6:40 am-6:41 pm

2 stops19h 01m

$745

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/6

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Tue 10/13

1:15 pm-2:00 pm

1 stop31h 45m

$746

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 10/11

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 10/21

12:15 pm-2:17 pm

2 stops33h 02m

$751

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/7

1:29 pm-12:40 pm

2 stops16h 11m

Barcelona-El Prat

Sun 10/18

6:40 am-1:25 pm

1 stop13h 45m

$754

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/6

8:00 am-8:00 am

2 stops17h 00m

Barcelona-El Prat

Tue 10/13

12:15 pm-2:17 pm

2 stops33h 02m

$756

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 12/26

7:04 pm-9:35 am

2 stops31h 31m

Barcelona-El Prat

Wed 1/13

6:50 am-1:45 pm

1 stop13h 55m

$769

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 10/7

1:29 pm-12:40 pm

2 stops16h 11m

Barcelona-El Prat

Sun 10/18

6:40 am-1:25 pm

1 stop13h 45m

$775

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Tue 9/29

1:15 pm-2:00 pm

1 stop31h 45m

$776

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?

What is the cheapest month to fly to Barcelona?

The month of December is, on average, the cheapest month to fly to Barcelona from St. Louis, with most prices found around $414. If you don’t want to visit Barcelona in December, then you should wait until March to fly from St. Louis, when ticket prices are also cheap, with an average price of $431.

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 $858 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
8,107 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
8,087 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.8
8,452 reviews
Search Delta flights
Air CanadaPriceFrom $560Free CancellationRating
7.1
11,286 reviews
Search Air Canada flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,925 reviews
Search United Airlines flights
American AirlinesPriceFrom $629Free CancellationRating
7.1
11,771 reviews
Search American Airlines flights
IberiaPriceFrom $637Free CancellationRating
7.0
3,249 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