Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Barcelona from $340

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 7/19. 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.

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

Find the cheapest flights from St. Louis to Barcelona

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
11:45 am - 1:15 pm
STL
-
BCN
18h 30m
2 stops
British Airways Logo
9:30 pm - 7:30 pm
BCN
-
STL
29h 00m
1 stop
$481British Airways
Tue, Apr 14 - Tue, Apr 28
British Airways Logo
8:03 pm - 10:40 pm
STL
-
BCN
19h 37m
2 stops
British Airways Logo
3:15 pm - 7:30 pm
BCN
-
STL
35h 15m
1 stop
$482British Airways
Tue, Apr 14 - Tue, Apr 28
British Airways Logo
12:25 pm - 2:25 pm
STL
-
BCN
19h 00m
2 stops
British Airways Logo
9:20 pm - 4:41 pm
BCN
-
STL
26h 21m
2 stops
$484British Airways
Mon, Apr 13 - Mon, Apr 27
British Airways Logo
2:33 pm - 4:25 pm
STL
-
BCN
18h 52m
2 stops
British Airways Logo
9:20 pm - 5:03 pm
BCN
-
STL
26h 43m
2 stops
$485British Airways
Mon, Apr 13 - Mon, Apr 27
Iberia Logo
9:34 am - 7:35 am
STL
-
BCN
15h 01m
1 stop
Iberia Logo
10:45 am - 10:59 pm
BCN
-
STL
19h 14m
1 stop
$487Iberia
Tue, Apr 14 - Tue, Apr 28
British Airways Logo
7:05 am - 10:35 am
STL
-
BCN
20h 30m
1 stop
British Airways Logo
8:35 pm - 7:30 pm
BCN
-
STL
29h 55m
1 stop
$491British Airways
Wed, Apr 15 - Mon, Apr 20
British Airways Logo
7:05 am - 10:55 am
STL
-
BCN
20h 50m
1 stop
British Airways Logo
9:20 pm - 7:27 pm
BCN
-
STL
29h 07m
2 stops
$493British Airways
Mon, Apr 13 - Mon, Apr 27
British Airways Logo
7:12 am - 7:35 am
STL
-
BCN
17h 23m
1 stop
British Airways Logo
9:20 pm - 4:41 pm
BCN
-
STL
26h 21m
2 stops
$494British Airways
Mon, Apr 13 - Mon, Apr 27
British Airways Logo
6:11 pm - 7:35 am
STL
-
BCN
30h 24m
1 stop
British Airways Logo
6:35 pm - 7:30 pm
BCN
-
STL
31h 55m
1 stop
$501British Airways
Tue, Apr 14 - Tue, Apr 28
British Airways Logo
6:11 pm - 7:35 am
STL
-
BCN
30h 24m
1 stop
British Airways Logo
3:15 pm - 7:30 pm
BCN
-
STL
35h 15m
1 stop
$502British Airways
Tue, Apr 14 - Tue, Apr 28

British Airways flights from St. Louis to Barcelona

Our best British Airways deals on St. Louis to Barcelona flight tickets
British Airways
Apr 14
STL11:45 amLambert-St Louis
18h 30m
2 stops
BCN1:15 pmBarcelona-El Prat
Apr 28
BCN9:30 pmBarcelona-El Prat
29h 00m
1 stop
STL7:30 pmLambert-St Louis
$481
British Airways
Apr 14
STL8:03 pmLambert-St Louis
19h 37m
2 stops
BCN10:40 pmBarcelona-El Prat
Apr 28
BCN3:15 pmBarcelona-El Prat
35h 15m
1 stop
STL7:30 pmLambert-St Louis
$482
British Airways
Apr 13
STL12:25 pmLambert-St Louis
21h 00m
2 stops
BCN4:25 pmBarcelona-El Prat
Apr 27
BCN9:20 pmBarcelona-El Prat
27h 02m
2 stops
STL5:22 pmLambert-St Louis
$484

United Airlines flights from St. Louis to Barcelona

Our best United Airlines deals on St. Louis to Barcelona flight tickets
United Airlines
Mar 24
STL10:00 amLambert-St Louis
16h 35m
2 stops
BCN8:35 amBarcelona-El Prat
Mar 31
BCN12:15 pmBarcelona-El Prat
41h 41m
2 stops
STL10:56 pmLambert-St Louis
$519
United Airlines
Mar 23
STL7:00 amLambert-St Louis
20h 00m
1 stop
BCN9:00 amBarcelona-El Prat
Apr 8
BCN6:40 amBarcelona-El Prat
13h 45m
1 stop
STL1:25 pmLambert-St Louis
$525
United Airlines
Mar 3
STL8:30 amLambert-St Louis
16h 50m
1 stop
BCN8:20 amBarcelona-El Prat
Mar 17
BCN12:35 pmBarcelona-El Prat
32h 07m
2 stops
STL2:42 pmLambert-St Louis
$667

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 February 9, 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

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

11:45 am-1:15 pm

2 stops18h 30m

Barcelona-El Prat

Tue 4/28

9:30 pm-7:30 pm

1 stop29h 00m

$481

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

8:03 pm-10:40 pm

2 stops19h 37m

Barcelona-El Prat

Tue 4/28

3:15 pm-7:30 pm

1 stop35h 15m

$482

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

12:25 pm-2:25 pm

2 stops19h 00m

Barcelona-El Prat

Mon 4/27

9:20 pm-4:41 pm

2 stops26h 21m

$484

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

2:33 pm-4:25 pm

2 stops18h 52m

Barcelona-El Prat

Mon 4/27

9:20 pm-5:03 pm

2 stops26h 43m

$485

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

9:34 am-7:35 am

1 stop15h 01m

Barcelona-El Prat

Tue 4/28

10:45 am-10:59 pm

1 stop19h 14m

$487

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 4/15

7:05 am-10:35 am

1 stop20h 30m

Barcelona-El Prat

Mon 4/20

8:35 pm-7:30 pm

1 stop29h 55m

$491

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

7:05 am-10:55 am

1 stop20h 50m

Barcelona-El Prat

Mon 4/27

9:20 pm-7:27 pm

2 stops29h 07m

$493

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

7:12 am-7:35 am

1 stop17h 23m

Barcelona-El Prat

Mon 4/27

9:20 pm-4:41 pm

2 stops26h 21m

$494

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

6:11 pm-7:35 am

1 stop30h 24m

Barcelona-El Prat

Tue 4/28

6:35 pm-7:30 pm

1 stop31h 55m

$501

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

6:11 pm-7:35 am

1 stop30h 24m

Barcelona-El Prat

Tue 4/28

3:15 pm-7:30 pm

1 stop35h 15m

$502

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 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 November to fly from St. Louis, when ticket prices are also cheap, with an average price of $666.

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 $848 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 $628 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 43m

Direct flights

None
The fastest flight from St. Louis to Barcelona takes 12h 43m
There are no direct flights from St. Louis to Barcelona. There are no popular flight routes from St. Louis to Barcelona.
Search flight deals

  • 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 43m.

  • 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
7,775 reviews
Search Lufthansa flights
British AirwaysPriceFrom $540Free CancellationRating
6.7
7,721 reviews
Search British Airways flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,173 reviews
Search Delta flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,259 reviews
Search United Airlines flights
Air CanadaPriceFrom $593Free CancellationRating
7.1
10,699 reviews
Search Air Canada flights
American AirlinesPriceFrom $629Free CancellationRating
7.2
11,257 reviews
Search American Airlines flights
IberiaPriceFrom $631Free CancellationRating
7.0
3,110 reviews
Search Iberia flights
KLMPriceFrom $634Free CancellationRating
7.7
1,450 reviews
Search KLM 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
Wed 3/11
Wed 3/18
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