United Polaris offers lie-flat seats with aisle access, ideal for long-haul comfort.
United offers free meals and drinks in economy on long-haul international flights.
Planning a trip from San Francisco to Barcelona-El Prat? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.
Based on the flight data, it is generally cheaper to fly from San Francisco to Barcelona-El Prat on Tuesdays. The cheapest month to fly this route is typically February.
Cheapest Route: The cheapest route is directly from San Francisco to Barcelona-El Prat.
Booking Advance: Book your flight at least 120 days in advance for the best prices.
Cheapest Airline: WestJet is generally the cheapest airline for this route.
Layover Savings: Opting for a one-stop flight can significantly reduce the cost compared to a direct flight.
This feature is powered by ChatGPT: an OpenAI-developed artificial intelligence model trained with KAYAK proprietary data and third-party data not verified by KAYAK.
Low season | January |
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High season | June |
Cheapest flight | $164 |
Direct departures
San Francisco to Barcelona-El Prat
Monday
Lufthansa, United Airlines
Lufthansa, United Airlines
Tuesday
Finnair, Iberia, Lufthansa, +4 more
Finnair, Iberia, +5 more
3
4
Wednesday
Lufthansa, United Airlines
Lufthansa, United Airlines
Thursday
Finnair, Iberia, Lufthansa, +4 more
Finnair, Iberia, +5 more
3
4
Friday
Lufthansa, United Airlines
Lufthansa, United Airlines
Saturday
Finnair, Iberia, Lufthansa, +4 more
Finnair, Iberia, +5 more
3
4
Sunday
Finnair, Iberia, Lufthansa, +4 more
Finnair, Iberia, +5 more
3
4
Direct returns
Barcelona-El Prat to San Francisco
Monday
Lufthansa, United Airlines
Lufthansa, United Airlines
Tuesday
Finnair, Iberia, Lufthansa, +4 more
Finnair, Iberia, +5 more
3
4
Wednesday
Lufthansa, United Airlines
Lufthansa, United Airlines
Thursday
Finnair, Iberia, Lufthansa, +4 more
Finnair, Iberia, +5 more
3
4
Friday
Lufthansa, United Airlines
Lufthansa, United Airlines
Saturday
Finnair, Iberia, Lufthansa, +4 more
Finnair, Iberia, +5 more
3
4
Sunday
Finnair, Iberia, Lufthansa, +4 more
Finnair, Iberia, +5 more
3
4
Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.
Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.
Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.
Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.
Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.
Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.
They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.
The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.
While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.
get E+, a must for 5 hours flight if you are tall
Liked fold flat bed. Didn’t like having no window. Didn’t like poor choice of food and being served dinner very late, hours after take off of a 7:40pm flight. Servers not friendly. Food horrible in business class.
My luggage got lost and until today there is no solution to the problem. It's still missing
I am writing to demand an immediate refund and compensation for the absolutely unacceptable experience I endured with VUELING this week. On Monday, my flight was canceled, and despite this, I have yet to receive any refund. I was then taken to a hotel in a terrible location, where no food or even water was provided. The next day, I was rebooked on another flight, for which I had to personally cover an additional €50 in transportation costs—only to have that flight canceled as well. After waiting 10 hours, only 10 of us were offered alternative accommodations, while the rest were left stranded. We were forced to remain in this situation until Thursday without a single explanation or proper assistance. During this entire ordeal, we were only provided with breakfast and dinner, while being charged extra for drinks. This level of treatment is completely unacceptable. I expect an immediate refund for the cancelled flights and full compensation for the inconvenience, additional expenses, and the significant distress caused.
Only food for sale. Did not even offer water. No entertainment
Checking was efficient and quick. Adequate luggage space. Food for purchase only at high prices
Nothing. There was no flight. They cancelled the flight with no replacement about 9 hours before takeoff.
The flight was canceled at the last minute. Alternative flight was booked after 6 hours wait in Malaga airport.
Boarding with some sense and communication. It was a total free-for-all everyone coming all at once, no organisation of row numbers or priority.
Horrible, flight cancelled and had to come back the next day
Terrible. For clarity - this was the Level flight to Boston. Not Vueling. Would urge customers to avoid this airline. Gate agent was singularly unhelpful. He was argumentative, rude and went out of his way to ensure that every penny was collected for the baggage (which we realized given how early we were for flight we could have saved hundreds of dollars if we checked in on app). No onboard entertainment or WiFi. Half of the front section was empty because the seats did not work! Plane was falling apart.
No complimentary snacks, but I think that’s a standard in the USA. There were loud drunk Germans sitting in front of us.
ground crew and check-in was pathetic - insisted on charging me for luggage even though the ticket said it was already included. They also accidentally sent my luggage through without a luggage tag and had to retrieve it. Generally, it was like a bad movie.
The app on phone and the online check in is not good, it would not give me the option of Spain or Madrid City in the drop down menu and I couldn't move forward with online check in.
Well my luggage was damaged and they lost the plastic cover. I need to file a claim and I would like for someone to follow up with me on this. Thanks.
Bag misplaced. Iberia claims bag has been forwarded. But AirTag shows that the bag is still in Madrid.
Not having to check carry on bags when plane wasn’t full. (The told us it was)
Service and food were excellent, could have been more info in English.
I was in business class for the 8 hour flight where: 1. The WiFi did not work 2. The entertainment system did not work 3. We were told there were no hot drinks for the entire flight
I had an issue with the name on my ticket vs my passport name. I was very upset that the Iberia ticket clerk had no authorization to help me and I was left to fix it. It took 19 calls of persons promising to accomplish and not doing anything before I reached someone who helped me in 10 minutes. Two of them even hung up on me. I missed my original flight because of this. Terrible customer service.
Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.
Flight delayed Service could be better Iberia staff are not really friendly
I was transferred to an American Airlines flight. The boarding was late and unorganized. The seating was extremely tight and uncomfortable. Will not use AA again.
We were never able to take this flight because our first flight from Austin to Dallas was cancelled.
The check-in of my luggage was terrible. When purchased my tickets, one luggage and one carry-on was part of the fight. My flight was switched from British to American Airline. During check-in of luggage at the airport, I was denied and had to pay extra $75. How do I get reimbursed for this extra luggage payment?
This was the second time on BA, food terrible, bathrooms gross,( granted, that was mostly due to the disgusting children urinating all over it)boarding was late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress. Seats were painful, that's what you get for traveling like a poor in economy, right BA? Should have been able to afford business or first class if you want to actually be able to walk upright without back pain after a trip.
This was the second time on BA, food terrible, bathrooms gross, boarding late and disorganized. No gate issued until last minute st Heathrow, bad system, caused undue stress.
As I said Al & AJ were absolutely the best and wow they should be recognized for their amazing service!
The delay was not communicated via text and the person who helped with check in also didn’t inform me about the delay. I ended up missing my connection and it was a waste of 5 hours. The crew didn’t mention there would be someone at the gate informing of if I would be rebooked and there was no signage. Overall a very poor experience. The British Airways app was also very buggy, and didn’t work. I will avoid flying with British Airways when possible.
Cancelled flight minutes before boarding. Rescheduled flight was two days later
The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!
Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.
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