Latest deals
Insights
FAQs
Reviews
Price Alerts

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 9/27. 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

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
8:55 am - 9:20 am
STL
-
BCN
17h 25m
1 stop
Multiple Airlines Logo
6:40 am - 1:25 pm
BCN
-
STL
13h 45m
1 stop
$741Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
Multiple Airlines Logo
8:55 am - 8:00 am
STL
-
BCN
16h 05m
2 stops
Multiple Airlines Logo
6:40 am - 1:25 pm
BCN
-
STL
13h 45m
1 stop
$751Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
United Airlines Logo
8:30 pm - 1:15 pm
STL
-
BCN
33h 45m
1 stop
United Airlines Logo
1:15 pm - 2:00 pm
BCN
-
STL
31h 45m
1 stop
$759United Airlines
Sun, Sep 20 - Fri, Oct 2
United Airlines Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
United Airlines Logo
4:10 pm - 3:38 pm
BCN
-
STL
30h 28m
2 stops
$772United Airlines
Sun, Sep 20 - Fri, Oct 2
Air Canada Logo
5:00 am - 8:00 am
STL
-
BCN
20h 00m
2 stops
Air Canada Logo
6:40 am - 8:00 pm
BCN
-
STL
20h 20m
2 stops
$780Air Canada
Sun, Sep 20 - Fri, Oct 2
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
$782Multiple Airlines
Sun, Sep 20 - Fri, Oct 2
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
Air Canada Logo
12:10 pm - 8:00 am
STL
-
BCN
12h 50m
1 stop
Air Canada Logo
1:15 pm - 4:26 pm
BCN
-
STL
34h 11m
2 stops
$808Air Canada
Sun, Sep 20 - Sun, Sep 27
United Airlines Logo
6:00 am - 1:15 pm
STL
-
BCN
24h 15m
1 stop
United Airlines Logo
1:15 pm - 2:00 pm
BCN
-
STL
31h 45m
1 stop
$809United Airlines
Sun, Sep 20 - Sun, Sep 27
Air Canada Logo
5:00 am - 8:00 am
STL
-
BCN
20h 00m
2 stops
Air Canada Logo
1:15 pm - 4:26 pm
BCN
-
STL
34h 11m
2 stops
$813Air Canada
Sun, Sep 20 - Sun, Sep 27

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

United Airlines flights from St. Louis to Barcelona

Our best United Airlines deals on St. Louis to Barcelona flight tickets
United Airlines
Sep 20
STL8:30 pmLambert-St Louis
33h 45m
1 stop
BCN1:15 pmBarcelona-El Prat
Oct 2
BCN1:15 pmBarcelona-El Prat
31h 45m
1 stop
STL2:00 pmLambert-St Louis
$759
United Airlines
Sep 20
STL12:10 pmLambert-St Louis
12h 50m
1 stop
BCN8:00 amBarcelona-El Prat
Oct 2
BCN4:10 pmBarcelona-El Prat
30h 28m
2 stops
STL3:38 pmLambert-St Louis
$772
United Airlines
Sep 20
STL6:00 amLambert-St Louis
24h 15m
1 stop
BCN1:15 pmBarcelona-El Prat
Sep 27
BCN1:15 pmBarcelona-El Prat
31h 45m
1 stop
STL2:00 pmLambert-St Louis
$809

Air Canada flights from St. Louis to Barcelona

Our best Air Canada deals on St. Louis to Barcelona flight tickets
Air Canada
Sep 20
STL5:00 amLambert-St Louis
20h 00m
2 stops
BCN8:00 amBarcelona-El Prat
Oct 2
BCN6:40 amBarcelona-El Prat
20h 20m
2 stops
STL8:00 pmLambert-St Louis
$780
Air Canada
Sep 20
STL12:10 pmLambert-St Louis
12h 50m
1 stop
BCN8:00 amBarcelona-El Prat
Sep 27
BCN1:15 pmBarcelona-El Prat
34h 11m
2 stops
STL4:26 pmLambert-St Louis
$808
Air Canada
Sep 20
STL5:00 amLambert-St Louis
20h 00m
2 stops
BCN8:00 amBarcelona-El Prat
Sep 27
BCN1:15 pmBarcelona-El Prat
34h 11m
2 stops
STL4:26 pmLambert-St Louis
$813

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 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

Tue 9/22

8:55 am-9:20 am

1 stop17h 25m

Barcelona-El Prat

Tue 9/29

6:40 am-1:25 pm

1 stop13h 45m

$741
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 9/22

8:55 am-8:00 am

2 stops16h 05m

Barcelona-El Prat

Tue 9/29

6:40 am-1:25 pm

1 stop13h 45m

$751

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

8:30 pm-1:15 pm

1 stop33h 45m

Barcelona-El Prat

Fri 10/2

1:15 pm-2:00 pm

1 stop31h 45m

$759

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Fri 10/2

4:10 pm-3:38 pm

2 stops30h 28m

$772

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

5:00 am-8:00 am

2 stops20h 00m

Barcelona-El Prat

Fri 10/2

6:40 am-8:00 pm

2 stops20h 20m

$780

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

5:00 am-8:00 am

2 stops20h 00m

Barcelona-El Prat

Fri 10/2

6:40 am-3:38 pm

2 stops15h 58m

$782

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

Sun 9/20

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Sun 9/27

1:15 pm-4:26 pm

2 stops34h 11m

$808

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 9/20

6:00 am-1:15 pm

1 stop24h 15m

Barcelona-El Prat

Sun 9/27

1:15 pm-2:00 pm

1 stop31h 45m

$809

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

1:15 pm-4:26 pm

2 stops34h 11m

$813

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?

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 $827 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

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
7,959 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
7,931 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,467 reviews
Search Delta flights
Air CanadaPriceFrom $560Free CancellationRating
7.1
10,979 reviews
Search Air Canada flights
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,680 reviews
Search United Airlines flights
American AirlinesPriceFrom $607Free CancellationRating
7.1
11,680 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,203 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.

An easier way to manage your Barcelona trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 5/29
Fri 6/5
By creating a price alert you accept our terms of use and privacy policy.

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