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 3 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.

$539 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

Sat, Oct 31 - Thu, Nov 12

10:45 pm - 11:00 am

SFO

LIS

29h 15m

1 stop

5:00 am - 12:40 pm

LIS

SFO

15h 40m

1 stop

$796United Airlines

Sun, Nov 1 - Fri, Nov 13

5:20 am - 11:00 am

SFO

LIS

21h 40m

2 stops

5:00 am - 12:40 pm

LIS

SFO

15h 40m

1 stop

$800United 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

Wed, Oct 14 - Fri, Oct 30

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

Wed, Aug 19 - Wed, Sep 2

11:10 am - 9:20 am

SFO

LIS

14h 10m

1 stop

5:05 am - 12:40 pm

LIS

SFO

15h 35m

1 stop

$838United Airlines

Wed, Aug 12 - Wed, Aug 19

11:10 am - 9:20 am

SFO

LIS

14h 10m

1 stop

11:25 am - 2:52 pm

LIS

SFO

35h 27m

2 stops

$839United Airlines

Sun, Aug 2 - Fri, Aug 21

11:05 pm - 10:30 am

SFO

LIS

27h 25m

1 stop

11:25 am - 11:21 am

LIS

SFO

31h 56m

1 stop

$842United Airlines

Wed, Aug 19 - Fri, Sep 4

8:50 am - 9:20 am

SFO

LIS

16h 30m

2 stops

5:05 am - 12:40 pm

LIS

SFO

15h 35m

1 stop

$843United Airlines

Wed, Aug 12 - Wed, Aug 19

8:50 am - 9:20 am

SFO

LIS

16h 30m

2 stops

11:25 am - 2:52 pm

LIS

SFO

35h 27m

2 stops

$844United Airlines

Useful Info

Low season	January
High season	December
Cheapest flight	$539
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 3 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

Good9,736 verified ratings

7.1Entertainment

6.6Food

8.1Crew

7.3Comfort

7.7Boarding

2.0 Poor

Babu, May 2026

AMS

LIS

OK, I don’t expect much from coach class. Everything basically is pretty lousy. But at least I expect my bloody luggage to get from A to B. Tap Airlines lost my luggage and it has been more than 24 hours in Lisbon and they still have not located my luggage. On top of that, they are incredibly unhelpful. They feel actually dismissive. This lousy customer service.

10.0 Wonderful

Babu, May 2026

SFO

AMS

Boarding felt messy and disorganized.

6.0 Okay

Verified traveler, May 2026

GYE

PTY

I would have liked to have been served more food when it came to Panama to Newark

2.0 Poor

Verified traveler, May 2026

MUC

IAH

Horrible, absolutely horrible. The airline overbooked the flight, did NOT assign seats and boarding was a hot mess with lots of confused passengers. There was no "large plane" gate for us, the 500+ passengers were squeezed in a small hold room area, and multiple busses had to shuttle us to the other side of the airfield, where boarding of the plane, that was parked on the ramp, took place in rain. The old plane had a broken seat, that the technicians tried to fix - with no success - resulting in a 50min delay. The flight attendant with heart shaped earnings with German flag was screaming on the passengers without a reason, was extremely rude and entitled the entire flight. The food was junk. I hope I don't have to fly United ever again.

8.0 Very good

Verified traveler, May 2026

KRK

MUC

Quick boarding. We left on time even though the plane came in late.

6.0 Okay

rsillman, May 2026

ACV

SFO

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

10.0 Wonderful

DAVID, May 2026

BZN

SFO

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

8.0 Very good

Donna, May 2026

IAD

ATH

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

8.0 Very good

Donna, May 2026

ROA

IAD

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

4.0 Mediocre

Charlotte, May 2026

IAH

LAX

Very long delays. Crew is excellent!!

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SFO - LIS

$539 Find Cheap United Airlines Flights from San Francisco to Lisbon

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Cheap 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 3 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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