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 113 days before departure.

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

With an average price of $995 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 $690 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 $437 for a return flight and $365 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 $427. The most expensive day is generally Friday, where the average price is around $667.

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 October, where plane tickets cost $571 on average. If possible, try to avoid the most expensive months of May and June, where tickets cost $886 and $929 respectively.

$434 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

Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from San Francisco to Lisbon that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Last minute

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

Recommended round-trip United Airlines deals departing in the coming months from the most popular airlines that fly from San Francisco to Lisbon.

Discover the best prices and deals for you by selecting your travel dates.

Choose your dates

8:30 am - 9:20 amSFO-LIS

16h 50m1 stop

11:00 am - 3:34 pmLIS-SFO

36h 34m2 stops

$532United Airlines

Find Deal

Tue, Feb 4 - Tue, Feb 25

12:55 pm - 10:15 amSFO-LIS

13h 20m1 stop

11:00 am - 5:48 pmLIS-SFO

37h 48m2 stops

$537United Airlines

Find Deal

Tue, Feb 25 - Tue, Mar 25

11:59 pm - 8:10 amSFO-LIS

24h 11m2 stops

10:55 am - 5:45 pmLIS-SFO

38h 50m2 stops

$541United Airlines

Find Deal

Sun, Feb 2 - Thu, Feb 13

10:55 pm - 10:15 amSFO-LIS

27h 20m1 stop

11:00 am - 10:52 amLIS-SFO

30h 52m1 stop

$544United Airlines

Find Deal

Sun, Mar 2 - Wed, Mar 19

8:30 am - 9:20 amSFO-LIS

17h 50m1 stop

11:00 am - 9:51 pmLIS-SFO

17h 51m1 stop

$545United Airlines

Find Deal

Tue, Mar 11 - Tue, Mar 18

8:30 am - 9:20 amSFO-LIS

16h 50m1 stop

10:55 am - 9:51 pmLIS-SFO

18h 56m1 stop

$548United Airlines

Find Deal

Tue, Jan 28 - Thu, Feb 13

8:30 am - 9:20 amSFO-LIS

17h 50m1 stop

5:05 am - 12:40 pmLIS-SFO

15h 35m1 stop

$549United Airlines

Find Deal

Tue, Mar 18 - Tue, Apr 1

12:55 pm - 10:15 amSFO-LIS

13h 20m1 stop

11:00 am - 9:51 pmLIS-SFO

17h 51m1 stop

$550United Airlines

Find Deal

Mon, Mar 3 - Tue, Mar 18

4:30 pm - 9:20 amSFO-LIS

32h 50m1 stop

10:55 am - 9:51 pmLIS-SFO

18h 56m1 stop

$551United Airlines

Find Deal

Sun, Feb 16 - Thu, Feb 27

12:55 pm - 10:15 amSFO-LIS

13h 20m1 stop

6:10 am - 7:45 pmLIS-SFO

20h 35m1 stop

$553United Airlines

Find Deal

Tue, Mar 4 - Fri, Mar 21

Low season	January
High season	June
Cheapest flight	$434
Average price round-trip	$687

Best time to beat the crowds with an average 25% drop in price.

Most popular time to fly with an average 44% 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 113 days before departure.
Is United Airlines the cheapest airline to fly with from San Francisco to Lisbon?
With an average price of $995 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 $690 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 $437 for a return flight and $365 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 $427. The most expensive day is generally Friday, where the average price is around $667.
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 October, where plane tickets cost $571 on average. If possible, try to avoid the most expensive months of May and June, where tickets cost $886 and $929 respectively.

See more FAQs

7.4

GoodBased on 8,965 verified guest reviews

7.3Comfort

7.1Entertainment

6.7Food

8.1Crew

7.7Boarding

Pros +

Cons -

Show reviews that mention

10.0 Wonderful

helga, Jan 2025

DEN-LAX

Good service for the price.

10.0 Wonderful

helga, Jan 2025

MCO-DEN

I liked all the informational texts. I always knew where to go and when .

2.0 Poor

Verified traveler, Jan 2025

ZRH-LAX

I feel bad, but Swiss airlines is not an airlines I will ever fly again. Their cabins are basic, seats are extremely uncomfortable, crew is a hit or a miss with service. What's worse is how they make you feel they are there to make money and not make your travel needs be met or make your travel a pleasure. They charge for 2nd bags, seat selection and felt like a budget arinines frontier/spirit airline attitude and approach. Their business class is from the early 2000s, basic. Additionally, planes going to India, are old, falling apart and not maintained. Even the crew mentioned this is typical of the airline having older planes going to India. Panels detached and loose or stuck with duct tape, seats scruffed up and dirty, seatbelts roughed up. The scariest thing was when I saw a window panel next to where I was sitting loose and dangling. The crew mentioned it's only cosmetic and assured the integrity of the plane was inspected by the maintenance crew. This is where they confessed about planes going to India being old. I UNFORTUNATELY would NOT recommend Swiss airlines to anyone and will NEVER fly with them again!

10.0 Wonderful

Verified traveler, Jan 2025

BOG-EWR

Very punctual. Comfortable plane and great entertainment options. The staff was very nice.

4.0 Mediocre

Verified traveler, Jan 2025

WAW-FRA

Recommended Airlines. Better then United.

6.0 Okay

Jesse, Jan 2025

EWR-GRU

Boarding is very confusing. They have Line 1 and Line 2 and many many Boarding groups. Everyone lines up under those two lines long before they call zones. If you have a higher zone 2 like I did due to a Premium Plus ticket, it’s very awkward having to ask each person which zone they have. Extremely chaotic process. On board the flight attendants had no charisma whatsoever, even to us paying extra for an upgraded cabin. I asked for a chamomile tea after dinner (as no coffee or tea was even offered) and the FÃ said they didn’t have even though listed on the drink menu. Also, the mid flight service was entirely skipped which was a soup and sandwich combo. Supposedly had a variety of snacks mid flight too but those never materialized either. A few times I walked Back there, not a single flight attendant acknowledged me as they were all deep into their iPhones. I simply Wanted a glass of water since ZERO water runs were made on this 9hr 30 min flight.

2.0 Poor

Verified traveler, Jan 2025

YYZ-IAH

Crew was nice

10.0 Wonderful

Verified traveler, Jan 2025

FRA-EWR

Excellent

4.0 Mediocre

Jagannath, Jan 2025

RSW-EWR

Liked the hospitality . The ight took us 6 hrs to get from fort myers to ewr.

2.0 Poor

B Lynne, Jan 2025

YYC-IAH

Plane 3 hours late. Missed connection. No help from gate staff. App horrible. Lost connection repeatedly. No service desk. Finally got help from young girl driving cart.