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

With an average price of $819 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 $565 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 $503 for a return flight and $327 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 $388. The most expensive day is generally Thursday, where the average price is around $504.

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 December and September, where tickets cost $588 and $773 respectively.

$516 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

Sun, Apr 26 - Tue, May 5

8:30 am - 11:00 am

SFO

LIS

18h 30m

1 stop

11:25 am - 5:40 pm

LIS

SFO

38h 15m

2 stops

$714United Airlines

Sat, Apr 18 - Tue, Apr 28

4:55 pm - 10:30 am

SFO

LIS

33h 35m

1 stop

11:25 am - 9:22 pm

LIS

SFO

17h 57m

1 stop

$735United Airlines

Sat, Apr 18 - Tue, Apr 28

4:55 pm - 10:30 am

SFO

LIS

33h 35m

1 stop

10:25 am - 8:34 pm

LIS

SFO

18h 09m

1 stop

$736United Airlines

Sat, Apr 18 - Tue, Apr 28

4:55 pm - 10:30 am

SFO

LIS

33h 35m

1 stop

10:25 am - 8:50 pm

LIS

SFO

18h 25m

2 stops

$741United Airlines

Wed, Aug 12 - Wed, Jan 13

11:10 am - 9:20 am

SFO

LIS

14h 10m

1 stop

5:00 am - 3:55 pm

LIS

SFO

18h 55m

1 stop

$742United Airlines

Sat, Apr 25 - Tue, May 19

4:15 pm - 11:00 am

SFO

LIS

34h 45m

1 stop

12:20 pm - 8:49 pm

LIS

SFO

16h 29m

1 stop

$770United Airlines

Sat, Apr 25 - Tue, May 19

4:55 pm - 10:30 am

SFO

LIS

33h 35m

1 stop

12:20 pm - 9:49 pm

LIS

SFO

17h 29m

1 stop

$771United Airlines

Sat, Apr 25 - Tue, May 19

4:15 pm - 11:00 am

SFO

LIS

34h 45m

1 stop

10:25 am - 9:34 pm

LIS

SFO

19h 09m

2 stops

$774United Airlines

Sat, Apr 25 - Tue, May 19

4:55 pm - 10:30 am

SFO

LIS

33h 35m

1 stop

12:20 pm - 8:48 am

LIS

SFO

28h 28m

2 stops

$776United Airlines

Mon, Aug 10 - Tue, Sep 1

8:10 am - 9:20 am

SFO

LIS

17h 10m

1 stop

11:25 am - 1:08 pm

LIS

SFO

33h 43m

2 stops

$779United Airlines

Useful Info

Low season	January
High season	December
Cheapest flight	$516
Average price round-trip	$777

Best time to beat the crowds with an average 9% drop in price.

Most popular time to fly with an average 10% 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

Is United Airlines the cheapest airline to fly with from San Francisco to Lisbon?
With an average price of $819 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 $565 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 $503 for a return flight and $327 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 $388. The most expensive day is generally Thursday, where the average price is around $504.
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 December and September, where tickets cost $588 and $773 respectively.

7.4

Good9,548 verified ratings

8.1Crew

7.3Comfort

7.1Entertainment

6.6Food

7.7Boarding

6.0 Okay

Lawrence, Apr 2026

SFO

IAH

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

2.0 Poor

Verified traveler, Apr 2026

BIO

MUC

Somebody entered our names incorrectly so it didn't match our passports. KAYAK first time... never again. Boarding passes and security took so much time to correct. Massive stress: both names messed up. Know we entered correctly via screen shot. Very troublesome. Never took a United airlines or planes as Kauak booked It was so messed up.

10.0 Wonderful

Jude, Apr 2026

YOW

IAD

Great

6.0 Okay

Verified traveler, Apr 2026

NRT

ORD

Food and drink service was very low quality. The flight attendants in business class must have been short some staff. Service was sluggish and not much English was spoken

10.0 Wonderful

Mitchell, Apr 2026

EWR

SFO

Flight left on time, arrived early, pleasant staff provided water, coffee, etc. access to bathrooms was reasonable and were well maintained. blankets were available, lots of entertainment options. LUGGAGE SERVICE WAS GREAT. I got my one checked bag quickly and was able to make a bus connection for a 2 hour bus ride saving me from waiting another 1.5 hours.

6.0 Okay

Verified traveler, Apr 2026

MCO

DEN

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

4.0 Mediocre

Verified traveler, Apr 2026

MSY

ORD

The flight was officially delayed 3 times, and was actually later than that. Combined, it was a 3 hour delay, but there was no recognition (miles, voucher, etc). The crew seemed stressed. The captain sounded nervous in his announcements. The flight itself was smooth and uneventful.

2.0 Poor

Harry, Apr 2026

IAD

PIT

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

10.0 Wonderful

Nan, Apr 2026

ORD

FRA

Great until we got to FRA. The next trip leg we were put in Business Class where seats had minimal padding!!!! They were awful and United Airlines needs to have their Lufthansa partner up their game or I won’t fly with them again!!

4.0 Mediocre

Verified traveler, Apr 2026

NRT

EWR

Food was awful. TV didn’t work for long haul flight and my husband needed credit. Staff was nice and did their best but overall conditions were very uncomfortable.

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SFO - LIS

$516 Find Cheap United Airlines Flights from San Francisco to Lisbon

Search hundreds of travel sites at once for deals on United Airlines flights from San Francisco to Lisbon

Cheap United Airlines Flight Deals from San Francisco to Lisbon

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

Recent one-way 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

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

With an average price of $819 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 $565 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 $503 for a return flight and $327 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 $388. The most expensive day is generally Thursday, where the average price is around $504.

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 December and September, where tickets cost $588 and $773 respectively.

United Airlines Customer Reviews

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