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.
AI-powered; AI can make mistakes.
| Low season | January |
|---|---|
| High season | June |
| Cheapest flight | $243 |
Direct departures
San Francisco to Barcelona-El Prat
Wednesday
United Airlines
United Airlines
Saturday
United Airlines
United Airlines
Direct returns
Barcelona-El Prat to San Francisco
from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.
from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.
This was an older airplane. The cabin was constantly warm to hot throughout the 10 hour flight and there were no vents to personalize air flow. Also since it was an older plane, the material and comfort of the chairs were very uncomfortable. I left my flight with major soreness on my tailbone.
Older aircraft, no meal, only food was for purchase. Not impressed United.
Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?
My experience on this United Airlines flight was highly uncomfortable, primarily due to two issues: Cabin Temperature: The temperature on the Boeing 737 MAX 8 was unacceptably high, feeling consistently around 80 degrees throughout the flight. This made sleeping impossible and significantly detracted from the experience. Seating Arrangement: Being stuck in a middle seat for a six-and-a-half-hour overnight flight compounded the discomfort. Moving forward, I will always purchase a seat assignment to avoid this situation.
Premium Plus is a really good idea for longer flights
Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly
We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.
We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.
From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.
To complex. So many types of fare. This made the boarding a caos.
Needs faster boarding procedure. Not their fault but should still take into account indifferent flyers.
Very fast boarding. Crew members were super nice. I loved it!
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.
It was budget airline Veuling, even though we booked Iberia.
The staff was very nice and helpful. Some of the best crew I have met.
Bad experience. The seat room are very tight. The food is not good and the breakfast has no hot drink.
Suddenly, I don't find my flight back on the app Help Ticket 0757345716866 Hoeflich Flight back Sunday ib5333 Ib2629 Ib4268
Great : The crew was awesome ♥️ To improve : - The rice in the "Rice with chicken" was rather s kind of rice pudding, not good at all - No power outlet to charge your phone. 😒
It was a good flight overall. Nothing to add. Keep it up!
Excellent. Thanks to United Star Alliance, since economy was overbooked, I’m grateful to have been upgraded to Business Class.
Good plane, excellent food, crew and entertainment. Seats in business could use an upgrade
Delayed. Mismanagement of gate lines. Passengers arguing with eachother as a result of lack of organization by airline. Avoid this airline.
Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.
Airlines have to stop assuming passengers bring entertainment. Provide it like you used to in business class and above!! N
Need to offer Better food from LAX to London Service from London to Delhi very delayed after take off.
Great crew and food and beverage. Seating tight but not the airline's fault. Will definitely fly BA in future!
Crying baby the ENTIRE flight. Not your fault, but I paid 2700 for a premium economy ticket and it wasn't worth it. should have just stuck with coach. flight attendants very mediocre - minimal effort. Plane didn't seem very clean. Didn't have any cleansing wipes - most airlines give you this when you board. Flat screen scrolling didn't work. Toiletry case a joke - why bother at all?
Enjoyable flight, helpful crew everything was organized to accommodate passengers.
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.
As I said Al & AJ were absolutely the best and wow they should be recognized for their amazing service!