How far in advance should I book tickets for a flight with United Airlines from San Francisco to Barcelona-El Prat Airport?

Generally, when trying to get a below average price for your ticket, try to book around 1 days before departure. For the cheapest possible price, our data suggests booking 49 days before departure.

Is United Airlines the cheapest airline to fly with from San Francisco to Barcelona-El Prat Airport?

With an average price of $851 return, United Airlines is not the cheapest airline to fly from San Francisco to Barcelona-El Prat Airport with. Instead, for the lowest price, our data suggests flying with TAP AIR PORTUGAL, where a return flight costs $480 on average.

Does United Airlines fly direct to Barcelona-El Prat Airport from San Francisco?

No, United Airlines does not fly the route directly.

What’s the cheapest day of the week to fly from San Francisco to Barcelona-El Prat Airport with United Airlines?

On average, the cheapest day of the week to fly from San Francisco to Barcelona-El Prat Airport with United Airlines is Monday, when prices are around $394. The most expensive day is generally Thursday, where the average price is around $468.

What’s the cheapest month to fly from San Francisco to Barcelona-El Prat Airport with United Airlines?

The cheapest month for United Airlines flights to Barcelona-El Prat Airport from San Francisco is generally October, where plane tickets cost $434 on average. If possible, try to avoid the most expensive months of May and June, where tickets cost $719 and $773 respectively.

$418 Cheap United Airlines Flights from San Francisco to Barcelona-El Prat Airport

SFO - BCN

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Flight Deals

Cheap United Airlines Flight Deals from San Francisco to Barcelona-El Prat Airport

Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from San Francisco to Barcelona-El Prat Airport that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip United Airlines flight deals from San Francisco to Barcelona-El Prat Airport

Mon, Jan 12 - Tue, Jan 27

5:00 am - 9:35 am

SFO

BCN

19h 35m2 stops

1:35 pm - 9:35 pm

BCN

SFO

41h 00m2 stops

$488United Airlines

Mon, Jan 12 - Tue, Jan 27

7:00 am - 9:00 am

SFO

BCN

17h 00m1 stop

11:00 am - 11:00 pm

BCN

SFO

21h 00m2 stops

$497United Airlines

Tue, Apr 7 - Wed, Apr 15

4:15 pm - 9:20 am

SFO

BCN

32h 05m1 stop

10:15 am - 4:05 pm

BCN

SFO

14h 50m1 stop

$500United Airlines

Sun, Feb 8 - Fri, Feb 20

12:43 am - 9:35 am

SFO

BCN

23h 52m3 stops

5:50 am - 3:55 pm

BCN

SFO

19h 05m1 stop

$501United Airlines

Mon, Jan 12 - Tue, Jan 20

6:45 am - 9:00 am

SFO

BCN

17h 15m2 stops

1:35 pm - 9:22 pm

BCN

SFO

16h 47m1 stop

$502United Airlines

Tue, Feb 10 - Fri, Feb 20

12:43 am - 9:35 am

SFO

BCN

23h 52m3 stops

5:50 am - 9:22 pm

BCN

SFO

24h 32m2 stops

$505United Airlines

Wed, Feb 25 - Thu, Mar 5

8:25 am - 2:15 pm

SFO

BCN

20h 50m2 stops

1:35 pm - 9:22 pm

BCN

SFO

16h 47m1 stop

$506United Airlines

Sat, Jan 17 - Wed, Jan 28

9:23 pm - 9:00 am

SFO

BCN

26h 37m2 stops

11:00 am - 10:58 pm

BCN

SFO

20h 58m2 stops

$509United Airlines

Wed, Feb 25 - Thu, Mar 5

6:45 am - 2:15 pm

SFO

BCN

22h 30m2 stops

1:35 pm - 7:23 am

BCN

SFO

26h 48m2 stops

$516United Airlines

Wed, Feb 25 - Fri, Mar 6

8:25 am - 2:15 pm

SFO

BCN

20h 50m2 stops

9:10 am - 11:09 pm

BCN

SFO

22h 59m2 stops

$518United Airlines

Useful Info

Low season	January
High season	June
Cheapest flight	$418
Average price round-trip	$885

Best time to beat the crowds with an average 29% drop in price.

Most popular time to fly with an average 51% increase in price.

Flight from San Francisco to Barcelona-El Prat

(price for this month)

When to Book Flights with United Airlines from San Francisco to Barcelona-El Prat Airport

Average price per month

Flight prices as travel date approaches

How far in advance should I book tickets for a flight with United Airlines from San Francisco to Barcelona-El Prat Airport?
Generally, when trying to get a below average price for your ticket, try to book around 1 days before departure. For the cheapest possible price, our data suggests booking 49 days before departure.
Is United Airlines the cheapest airline to fly with from San Francisco to Barcelona-El Prat Airport?
With an average price of $851 return, United Airlines is not the cheapest airline to fly from San Francisco to Barcelona-El Prat Airport with. Instead, for the lowest price, our data suggests flying with TAP AIR PORTUGAL, where a return flight costs $480 on average.
What is the cheapest United Airlines flight from San Francisco to Barcelona-El Prat Airport?
In the last 3 days, the lowest price for a flight with United Airlines from San Francisco to Barcelona-El Prat Airport was $535 for a return flight and $302 for a one-way flight.
Does United Airlines fly direct to Barcelona-El Prat Airport from San Francisco?
No, United Airlines does not fly the route directly.
What’s the cheapest day of the week to fly from San Francisco to Barcelona-El Prat Airport with United Airlines?
On average, the cheapest day of the week to fly from San Francisco to Barcelona-El Prat Airport with United Airlines is Monday, when prices are around $394. The most expensive day is generally Thursday, where the average price is around $468.
What’s the cheapest month to fly from San Francisco to Barcelona-El Prat Airport with United Airlines?
The cheapest month for United Airlines flights to Barcelona-El Prat Airport from San Francisco is generally October, where plane tickets cost $434 on average. If possible, try to avoid the most expensive months of May and June, where tickets cost $719 and $773 respectively.

7.4

Good9,114 verified ratings

7.7Boarding

6.6Food

8.1Crew

7.3Comfort

7.1Entertainment

Pros +

Flight was quick and easy. (in 2447 reviews)
"Clean plane, organized crew." (in 2084 reviews)

Show reviews that mention

10.0 Wonderful

Dr. Joseph, Dec 2025

ORD

EWR

Great flight. On time boarding. Smooth flight and on time arrival at EWR. The flight crew was marvelous and there was a great selection of movies on the entertainment system. Our bags were at the carousel before we got there. Another excellent flight from United.

10.0 Wonderful

Howard, Dec 2025

FLL

DEN

Was an easy flight

6.0 Okay

Verified traveler, Dec 2025

IAH

SFO

Houston airport is awful. Inefficient and rude.

8.0 Very good

Verified traveler, Dec 2025

EZE

IAH

everything was pretty good. Houston airport is awful. Unnecessarily inefficient; people working there are rude. Badly run

10.0 Wonderful

Verified traveler, Dec 2025

SFO

BOS

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

10.0 Wonderful

Rob, Dec 2025

RIC

ORD

They did the one thing that really matters - got to Chicago early.

8.0 Very good

Verified traveler, Dec 2025

ORD

PHX

I liked the snacks and the flight attendants were friendly.

10.0 Wonderful

Betty, Dec 2025

IAH

SFO

Good

10.0 Wonderful

Betty, Dec 2025

UIO

IAH

Very Good!! Offered drinks and very polite

2.0 Poor

Verified traveler, Dec 2025

ATL

FRA

Gate agent at Frankfurt was terrible. She denied PRE boarding even as it was printed on the boarding pass. Refused to look at the boarding pass and literally shouting for no reason. Frankfurt airport has horrible and rude staff who avoids trying to answer any question at all. Overall, horrible experience.

Everything you need to know for your flight from San Francisco to Barcelona-El Prat Airport

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Return flight deals

United Airlines flights

Other airlines flying from San Francisco to Barcelona-El Prat Airport

Iberia flights from San Francisco to Barcelona-El Prat Airport

SFO - BCN

$418 Find Cheap United Airlines Flights from San Francisco to Barcelona-El Prat Airport

Search hundreds of travel sites at once for deals on United Airlines flights from San Francisco to Barcelona-El Prat Airport

Cheap United Airlines Flight Deals from San Francisco to Barcelona-El Prat Airport

Recent round-trip United Airlines flight deals from San Francisco to Barcelona-El Prat Airport

Recent one-way United Airlines flight deals from San Francisco to Barcelona-El Prat Airport

Recent last minute United Airlines flight deals from San Francisco to Barcelona-El Prat Airport

Recent direct United Airlines flight deals from San Francisco to Barcelona-El Prat Airport

Good to know

When to Book Flights with United Airlines from San Francisco to Barcelona-El Prat Airport

FAQs for flying to Barcelona-El Prat Airport with United Airlines

How far in advance should I book tickets for a flight with United Airlines from San Francisco to Barcelona-El Prat Airport?

Generally, when trying to get a below average price for your ticket, try to book around 1 days before departure. For the cheapest possible price, our data suggests booking 49 days before departure.

Is United Airlines the cheapest airline to fly with from San Francisco to Barcelona-El Prat Airport?

With an average price of $851 return, United Airlines is not the cheapest airline to fly from San Francisco to Barcelona-El Prat Airport with. Instead, for the lowest price, our data suggests flying with TAP AIR PORTUGAL, where a return flight costs $480 on average.

What is the cheapest United Airlines flight from San Francisco to Barcelona-El Prat Airport?

In the last 3 days, the lowest price for a flight with United Airlines from San Francisco to Barcelona-El Prat Airport was $535 for a return flight and $302 for a one-way flight.

Does United Airlines fly direct to Barcelona-El Prat Airport from San Francisco?

No, United Airlines does not fly the route directly.

What’s the cheapest day of the week to fly from San Francisco to Barcelona-El Prat Airport with United Airlines?

On average, the cheapest day of the week to fly from San Francisco to Barcelona-El Prat Airport with United Airlines is Monday, when prices are around $394. The most expensive day is generally Thursday, where the average price is around $468.

What’s the cheapest month to fly from San Francisco to Barcelona-El Prat Airport with United Airlines?

The cheapest month for United Airlines flights to Barcelona-El Prat Airport from San Francisco is generally October, where plane tickets cost $434 on average. If possible, try to avoid the most expensive months of May and June, where tickets cost $719 and $773 respectively.

United Airlines Customer Reviews

Pros +

Traveler rating:

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Everything you need to know for your flight from San Francisco to Barcelona-El Prat Airport

Other airlines flying from San Francisco to Barcelona-El Prat Airport

Flight deals from the most popular airlines with KAYAK users flying the route

Cabin class types available on flights to Barcelona-El Prat Airport

Cabin classes available on flights to San Francisco. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Complete your trip to Barcelona-El Prat Airport with a hotel stay or car rental

Flights to other popular destinations

The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Find deals for your return flight

Top United Airlines flights

The most popular destinations for flights with United Airlines according to clicks from KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.