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 23 days before departure.

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

With an average price of $818 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 $563 on average.

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

In the last 3 days, the lowest price for a flight with United Airlines from San Francisco to Lisbon was $444 for a return flight and $282 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 Friday, when prices are around $407. The most expensive day is generally Thursday, where the average price is around $525.

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 August, where plane tickets cost $476 on average. If possible, try to avoid the most expensive months of June and September, where tickets cost $612 and $706 respectively.

$264 Cheap United Airlines Flights from San Francisco to Lisbon

SFO - LIS

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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

Tue, Apr 14 - Fri, May 1

9:05 pm - 10:45 pm

SFO

LIS

17h 40m

1 stop

1:00 pm - 9:10 pm

LIS

SFO

16h 10m

1 stop

$514United Airlines

Tue, Mar 17 - Wed, Mar 25

2:35 pm - 11:30 pm

SFO

LIS

25h 55m

1 stop

11:55 am - 1:28 am

LIS

SFO

20h 33m

1 stop

$515United Airlines

Thu, Apr 16 - Thu, Apr 30

9:05 pm - 10:45 pm

SFO

LIS

17h 40m

1 stop

7:25 am - 3:25 pm

LIS

SFO

16h 00m

1 stop

$516United Airlines

Sat, Feb 28 - Thu, Mar 19

11:59 pm - 8:10 am

SFO

LIS

24h 11m

2 stops

10:15 am - 12:16 am

LIS

SFO

21h 01m

2 stops

$517United Airlines

Mon, Mar 9 - Mon, Mar 16

10:40 pm - 11:30 pm

SFO

LIS

17h 50m

1 stop

6:10 am - 3:50 pm

LIS

SFO

16h 40m

1 stop

$518United Airlines

Sat, Apr 18 - Mon, Apr 27

11:20 pm - 10:30 am

SFO

LIS

27h 10m

1 stop

7:25 am - 12:40 pm

LIS

SFO

37h 15m

1 stop

$521United Airlines

Sat, Apr 18 - Sun, Apr 26

9:30 pm - 10:30 am

SFO

LIS

29h 00m

1 stop

5:05 am - 8:00 pm

LIS

SFO

22h 55m

1 stop

$524United Airlines

Mon, Mar 9 - Mon, Mar 16

2:35 pm - 11:30 pm

SFO

LIS

25h 55m

1 stop

5:00 am - 1:28 am

LIS

SFO

27h 28m

2 stops

$526United Airlines

Mon, Mar 9 - Mon, Mar 16

5:05 am - 8:10 am

SFO

LIS

20h 05m

2 stops

5:00 am - 1:28 am

LIS

SFO

27h 28m

2 stops

$527United Airlines

Sat, Apr 25 - Tue, May 12

4:55 pm - 10:30 am

SFO

LIS

33h 35m

1 stop

11:25 am - 11:25 am

LIS

SFO

32h 00m

1 stop

$528United Airlines

Useful Info

Low season	January
High season	June
Cheapest flight	$264
Average price round-trip	$650

Best time to beat the crowds with an average 12% drop in price.

Most popular time to fly with an average 32% 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 23 days before departure.
Is United Airlines the cheapest airline to fly with from San Francisco to Lisbon?
With an average price of $818 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 $563 on average.
What is the cheapest United Airlines flight from San Francisco to Lisbon?
In the last 3 days, the lowest price for a flight with United Airlines from San Francisco to Lisbon was $444 for a return flight and $282 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 Friday, when prices are around $407. The most expensive day is generally Thursday, where the average price is around $525.
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 August, where plane tickets cost $476 on average. If possible, try to avoid the most expensive months of June and September, where tickets cost $612 and $706 respectively.

7.4

Good9,257 verified ratings

7.3Comfort

7.1Entertainment

8.1Crew

7.7Boarding

6.6Food

10.0 Wonderful

Bill, Feb 2026

IAH

LAX

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

4.0 Mediocre

Vicky, Feb 2026

LAX

SYD

Terrible. Our first time back on United for 10 years, the seats in Polaris class are small and uncomfortable. They have squished too many people in to get more $$$. The staff are not friendly and not wanting to accommodate. I asked for two salads rather than a main meal and was advised no we wont do that. Then asked what I would like for breakfast and given something else anyway. I will not be flying United International anytime soon.

4.0 Mediocre

Charles, Feb 2026

AMS

EWR

Airport experience at Newark was not great. Only one gate open at immigration for US passports when multiple international flights arriving at the same time. Then having to take a train and a bus to different terminal only to have to clear security again, after I had already gone through at my initial departure location. Older plane, no entertainment screens available, and for economy plus, seat was very uncomfortable. Crew was friendly and this leg of my flight was on-time, even though I arrived later than initially scheduled due to 1st flight being over 2 hours delayed and missing my original connection.

2.0 Poor

Piers, Feb 2026

EWR

DXB

Same thing as flight from Pheonix to Newark. Uograded and Promised extra leg room and when I got to the seat it had none.

6.0 Okay

Piers, Feb 2026

PHX

EWR

I upgraded my seat and was promised it would be next to the emergency door for extra leg room and they said it was premium plus but it was at the back of the plane...same thing happened from Newark to Dubai

10.0 Wonderful

Verified traveler, Feb 2026

LGA

IAH

Everything except the food and entertainment. It was a great experience though

8.0 Very good

Verified traveler, Feb 2026

ORD

AMS

It was better than expected. Great flight crew!

2.0 Poor

Nikolaos, Feb 2026

MEX

ORD

No food for 5 hours flight! Very disappointed

10.0 Wonderful

Anton, Feb 2026

LHR

SFO

Just magically good

2.0 Poor

Verified traveler, Feb 2026

CLT

IAD

Bad food, bad service, cold cabin with no additional blankets when asked for (they told me they don’t provide additional blankets). I’m a frequent traveler and this is one of the worst companies I traveled with (by the way I thought that I booked my ticket with Lufthansa but I didn’t see that the flights were handled by United).

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

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SFO - LIS

$264 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 23 days before departure.

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

With an average price of $818 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 $563 on average.

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

In the last 3 days, the lowest price for a flight with United Airlines from San Francisco to Lisbon was $444 for a return flight and $282 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 Friday, when prices are around $407. The most expensive day is generally Thursday, where the average price is around $525.

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 August, where plane tickets cost $476 on average. If possible, try to avoid the most expensive months of June and September, where tickets cost $612 and $706 respectively.

United Airlines Customer Reviews

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

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