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Cheap flights from St. Louis (STL) to Barcelona

STL — BCN
Nov 8 — Nov 151
Sun 11/8
Sun 11/15
1 adult, Economy
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Find flight deals from St. Louis to Barcelona

Popular in

June

Cheapest in

April

Average price

$937
Highest demand for flights based on searches. 19% potential increase in price ($226 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Best time to book a flight from St. Louis to Barcelona

Have a flexible travel schedule? Discover the best time to fly to Barcelona from St. Louis with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Barcelona

How far ahead should I book a flight from St. Louis to Barcelona?

To ensure you get the cheapest price possible for a flight from St. Louis to Barcelona, you should look to book at least 10 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from St. Louis to Barcelona?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Barcelona (average of $634). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,461). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Barcelona

See what other customers who have flown with United Airlines,Air Canada, andAmerican Airlines from St. Louis to Barcelona have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,331 reviews

Overall

7.4

Comfort

7.3

Food

6.7

Entertainment

7.1

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
United Airlines
7.4
Good
10,331 reviews
United Airlines
7.4
Good
10,331 reviews

Overall

7.4

Comfort

7.3

Food

6.7

Entertainment

7.1

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
Air Canada
7.1
Good
11,748 reviews
United Airlines
7.4
Good
10,331 reviews

Overall

7.4

Comfort

7.3

Food

6.7

Entertainment

7.1

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
American Airlines
7.0
Good
12,150 reviews
United Airlines
7.4
Good
10,331 reviews

Overall

7.4

Comfort

7.3

Food

6.7

Entertainment

7.1

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
Lufthansa
6.8
Okay
8,269 reviews
United Airlines
7.4
Good
10,331 reviews

Overall

7.4

Comfort

7.3

Food

6.7

Entertainment

7.1

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
British Airways
6.7
Okay
8,255 reviews
United Airlines
7.4
Good
10,331 reviews

Overall

7.4

Comfort

7.3

Food

6.7

Entertainment

7.1

Crew

8.1

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Asha,Sep 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

Related info for your journey

  • What airport do you fly from for flights from St. Louis to Barcelona?

    If you book a flight to Barcelona from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from Lambert-St Louis to Barcelona per day from 7 different airlines.

  • What are the cheapest airlines flying from St. Louis to Barcelona round-trip?

    Lufthansa, at $510, was found to be the cheapest airline from St. Louis to Barcelona.Alternate airlines to your destination round-trip include British Airways and American Airlines. You may be able to fly from St. Louis to Barcelona for 46% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from St. Louis to Barcelona one-way?

    The cheapest airlines for a one-way flight from St. Louis to Barcelona are American Airlines ($252), Air Canada ($266), and Delta ($292).

  • Can I find deals for flights from St. Louis to Barcelona that include hotel bookings?

    Yes. In addition to deals on St. Louis to Barcelona flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Barcelona?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Barcelona.

  • Can I find deals for business class flights from St. Louis to Barcelona?

    Yes. Cheapflights offers flight deals from St. Louis to Barcelona by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Barcelona?

    Currently, April is the cheapest month in which you can book a flight from St. Louis to Barcelona (average of $634). Flying from St. Louis to Barcelona in June is currently the most expensive (average of $1,461). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for St. Louis to Barcelona

St. Louis to Barcelona-El Prat flights
Kansas City to Barcelona-El Prat flights

Top 7 airlines flying from St. Louis to Barcelona

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$510Average$1,038FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$540Average$1,015FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$574Average$981FlexibilityNo cancel feeOn-time71%
DeltaCheapest$585Average$778FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$618Average$1,048FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$648Average$1,173FlexibilityNo cancel feeOn-time67%
IberiaCheapest$703Average$1,037FlexibilityNo cancel feeOn-time77%

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