How far in advance should I book tickets for a flight with United Airlines from San Francisco to Lisbon?

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 91 days before departure.

Is United Airlines the cheapest airline to fly with from San Francisco to Lisbon?

With an average price of $831 return, United Airlines is not the cheapest airline to fly from San Francisco to Lisbon with. Instead, for the lowest price, our data suggests flying with Scandinavian Airlines, where a return flight costs $569 on average.

What is the cheapest United Airlines flight from San Francisco to Lisbon?

In the last 5 days, the lowest price for a flight with United Airlines from San Francisco to Lisbon was $675 for a return flight and $424 for a one-way flight.

Does United Airlines fly direct to Lisbon 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 Lisbon with United Airlines?

On average, the cheapest day of the week to fly from San Francisco to Lisbon with United Airlines is Sunday, when prices are around $378. The most expensive day is generally Tuesday, where the average price is around $456.

What’s the cheapest month to fly from San Francisco to Lisbon with United Airlines?

The cheapest month for United Airlines flights to Lisbon from San Francisco is generally February, where plane tickets cost $455 on average. If possible, try to avoid the most expensive months of November and April, where tickets cost $650 and $661 respectively.

$523 Cheap United Airlines Flights from San Francisco to Lisbon

SFO - LIS

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Flight Deals

Cheap United Airlines Flight Deals from San Francisco to Lisbon

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

Round-trip

One-way

Last minute

Recent round-trip United Airlines flight deals from San Francisco to Lisbon

Mon, Nov 2 - Fri, Nov 27

8:25 am - 9:50 am

SFO

LIS

17h 25m

1 stop

5:00 am - 12:40 pm

LIS

SFO

15h 40m

1 stop

$790United Airlines

Sat, Nov 7 - Tue, Nov 24

11:55 pm - 8:10 am

SFO

LIS

24h 15m

1 stop

5:00 am - 12:40 pm

LIS

SFO

15h 40m

1 stop

$792United Airlines

Sat, Oct 17 - Tue, Oct 27

11:46 pm - 9:20 am

SFO

LIS

25h 34m

1 stop

5:00 am - 1:40 pm

LIS

SFO

15h 40m

1 stop

$815United Airlines

Sun, Oct 18 - Wed, Oct 28

6:00 am - 9:20 am

SFO

LIS

19h 20m

2 stops

5:00 am - 1:40 pm

LIS

SFO

15h 40m

1 stop

$819United Airlines

Sun, Oct 18 - Wed, Oct 28

5:00 am - 9:20 am

SFO

LIS

20h 20m

2 stops

5:00 am - 1:40 pm

LIS

SFO

15h 40m

1 stop

$820United Airlines

Wed, Oct 14 - Wed, Oct 28

5:00 am - 9:20 am

SFO

LIS

20h 20m

2 stops

5:00 am - 6:56 pm

LIS

SFO

20h 56m

2 stops

$830United Airlines

Sat, Aug 8 - Thu, Aug 20

11:38 pm - 9:20 am

SFO

LIS

25h 42m

1 stop

7:25 am - 7:45 pm

LIS

SFO

20h 20m

1 stop

$837United Airlines

Sat, Aug 8 - Thu, Aug 20

11:38 pm - 9:20 am

SFO

LIS

25h 42m

1 stop

7:25 am - 7:45 pm

LIS

SFO

20h 20m

1 stop

$838United Airlines

Tue, Aug 11 - Wed, Aug 19

11:10 am - 9:20 am

SFO

LIS

14h 10m

1 stop

11:25 am - 7:12 pm

LIS

SFO

39h 47m

2 stops

$839United Airlines

Tue, Aug 11 - Fri, Aug 28

5:00 am - 9:20 am

SFO

LIS

20h 20m

2 stops

7:25 am - 3:15 pm

LIS

SFO

15h 50m

1 stop

$842United Airlines

Useful Info

Low season	January
High season	December
Cheapest flight	$523
Average price round-trip	$806

Best time to beat the crowds with an average 10% drop in price.

Most popular time to fly with an average 8% increase in price.

Flight from San Francisco to Lisbon

(price for this month)

When to Book Flights with United Airlines from San Francisco to Lisbon

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 Lisbon?
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 91 days before departure.
Is United Airlines the cheapest airline to fly with from San Francisco to Lisbon?
With an average price of $831 return, United Airlines is not the cheapest airline to fly from San Francisco to Lisbon with. Instead, for the lowest price, our data suggests flying with Scandinavian Airlines, where a return flight costs $569 on average.
What is the cheapest United Airlines flight from San Francisco to Lisbon?
In the last 5 days, the lowest price for a flight with United Airlines from San Francisco to Lisbon was $675 for a return flight and $424 for a one-way flight.
Does United Airlines fly direct to Lisbon 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 Lisbon with United Airlines?
On average, the cheapest day of the week to fly from San Francisco to Lisbon with United Airlines is Sunday, when prices are around $378. The most expensive day is generally Tuesday, where the average price is around $456.
What’s the cheapest month to fly from San Francisco to Lisbon with United Airlines?
The cheapest month for United Airlines flights to Lisbon from San Francisco is generally February, where plane tickets cost $455 on average. If possible, try to avoid the most expensive months of November and April, where tickets cost $650 and $661 respectively.

7.4

Good9,752 verified ratings

7.3Comfort

8.1Crew

7.1Entertainment

6.6Food

7.7Boarding

2.0 Poor

Verified traveler, May 2026

TPA

SFO

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

2.0 Poor

Chris, May 2026

AUS

IAD

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

8.0 Very good

Sandy, May 2026

IAH

ABQ

We had a delay, but thankfully I made it to my connection. Overall it went smooth

8.0 Very good

Sandy, May 2026

FLL

IAH

The flight had a delay but I made it to my connection. Flight was smooth overall

4.0 Mediocre

Rob, May 2026

EWR

RDU

As I wrote earlier, poor planning and/or communication. At least twice, we were told that we would be boarding in less than ten minutes, only to have the flight again delayed at least another hour.

4.0 Mediocre

Rob, May 2026

NCE

EWR

Our flight from Nice to Newark ran an hour late, and the food was mediocre, but it was fine. The problem was that we were scheduled to have a 4.5-hour layover in Newark, but then our flight to RDU was almost four hours late, finally departing at almost 11:30 p.m. We understand that flight delays were caused by weather problems in the East. However, there were at least two times, when were told that we would begin boarding in just a few minutes, only to have the flight delayed another 1.0-1.5 hours. This meant that we would leave a restaurant or the United Club, go to the gate, only to learn that there would be another major delay. Poor planning and/or communication.

8.0 Very good

Verified traveler, May 2026

DTW

ORD

This flight is a quick way to get to Chicago, but a bit expensive.

4.0 Mediocre

Linda, May 2026

BCN

IAD

There were no facilities in the middle of the aircraft and premium economy was not allowed to use the business class facilities, and had to share the only two toilets at the back with economy. The upgrade to Premium was definitely not worth it

2.0 Poor

Verified traveler, May 2026

DEN

MUC

Good job thank you very much for everything

10.0 Wonderful

Verified traveler, May 2026

SEA

HND

Very comfortable seating and the Flight staff were very attentive. The premium economy section that I was seated in was very clean, updated, and well appointed. I would highly recommend flying United Airlines as this experience was better than the Japan Airlines business class that I flew several months ago.

Everything you need to know for your flight from San Francisco to Lisbon

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SFO - LIS

$523 Find Cheap United Airlines Flights from San Francisco to Lisbon

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Cheap United Airlines Flight Deals from San Francisco to Lisbon

Recent round-trip United Airlines flight deals from San Francisco to Lisbon

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Good to know

When to Book Flights with United Airlines from San Francisco to Lisbon

FAQs for flying to Lisbon with United Airlines

How far in advance should I book tickets for a flight with United Airlines from San Francisco to Lisbon?

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 91 days before departure.

Is United Airlines the cheapest airline to fly with from San Francisco to Lisbon?

With an average price of $831 return, United Airlines is not the cheapest airline to fly from San Francisco to Lisbon with. Instead, for the lowest price, our data suggests flying with Scandinavian Airlines, where a return flight costs $569 on average.

What is the cheapest United Airlines flight from San Francisco to Lisbon?

In the last 5 days, the lowest price for a flight with United Airlines from San Francisco to Lisbon was $675 for a return flight and $424 for a one-way flight.

Does United Airlines fly direct to Lisbon 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 Lisbon with United Airlines?

On average, the cheapest day of the week to fly from San Francisco to Lisbon with United Airlines is Sunday, when prices are around $378. The most expensive day is generally Tuesday, where the average price is around $456.

What’s the cheapest month to fly from San Francisco to Lisbon with United Airlines?

The cheapest month for United Airlines flights to Lisbon from San Francisco is generally February, where plane tickets cost $455 on average. If possible, try to avoid the most expensive months of November and April, where tickets cost $650 and $661 respectively.

United Airlines Customer Reviews

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