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Cheap flights from San Francisco to Key West from $145

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Key West departing on 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from San Francisco to Key West (SFO-EYW)

Cheap round-trip flights

JetBlue Logo
10:00 pm - 11:53 amSFO-EYW
10h 53m1 stop
JetBlue Logo
12:45 pm - 11:54 pmEYW-SFO
14h 09m1 stop
$259JetBlue
Find Deal
Sat, Oct 25 - Fri, Oct 31
American Airlines Logo
12:27 am - 1:17 pmSFO-EYW
9h 50m1 stop
American Airlines Logo
3:49 pm - 10:40 pmEYW-SFO
9h 51m1 stop
$269American Airlines
Find Deal
Mon, Jan 19 - Thu, Jan 29
American Airlines Logo
11:55 pm - 12:55 pmSFO-EYW
10h 00m2 stops
American Airlines Logo
11:22 am - 6:58 pmEYW-SFO
10h 36m1 stop
$274American Airlines
Find Deal
Sat, Oct 25 - Fri, Oct 31
American Airlines Logo
11:25 pm - 12:55 pmSFO-EYW
10h 30m2 stops
American Airlines Logo
11:22 am - 9:56 pmEYW-SFO
13h 34m2 stops
$279American Airlines
Find Deal
Sat, Oct 25 - Fri, Oct 31
American Airlines Logo
11:25 pm - 1:29 pmSFO-EYW
11h 04m2 stops
American Airlines Logo
2:32 pm - 10:30 pmEYW-SFO
10h 58m2 stops
$285American Airlines
Find Deal
Sat, Oct 4 - Mon, Oct 6
Delta Logo
7:15 am - 8:06 pmSFO-EYW
9h 51m1 stop
Delta Logo
6:17 pm - 11:56 pmEYW-SFO
8h 39m1 stop
$289Delta
Find Deal
Tue, Oct 14 - Thu, Oct 16
JetBlue Logo
9:10 pm - 11:53 amSFO-EYW
11h 43m1 stop
JetBlue Logo
12:45 pm - 11:54 pmEYW-SFO
14h 09m1 stop
$293JetBlue
Find Deal
Thu, Oct 30 - Sun, Nov 2
Delta Logo
8:30 am - 7:44 pmSFO-EYW
8h 14m1 stop
Delta Logo
7:00 am - 2:47 pmEYW-SFO
10h 47m1 stop
$428Delta
Find Deal
Wed, Nov 26 - Thu, Nov 27
United Airlines Logo
11:55 pm - 2:13 pmSFO-EYW
11h 18m1 stop
United Airlines Logo
12:23 pm - 8:25 pmEYW-SFO
11h 02m1 stop
$434United Airlines
Find Deal
Tue, Dec 30 - Thu, Jan 8
United Airlines Logo
5:15 am - 4:18 pmSFO-EYW
8h 03m1 stop
United Airlines Logo
4:50 pm - 11:55 pmEYW-SFO
10h 05m1 stop
$474United Airlines
Find Deal
Sat, Jan 3 - Thu, Jan 8

American Airlines flights from San Francisco to Key West

Our best American Airlines deals on San Francisco to Key West flight tickets
American Airlines
Jan 19
SFO12:27 amSan Francisco
9h 50m
1 stop
EYW1:17 pmKey West
Jan 29
EYW3:49 pmKey West
9h 51m
1 stop
SFO10:40 pmSan Francisco
$269
Find similar
American Airlines
Oct 25
SFO11:55 pmSan Francisco
10h 00m
2 stops
EYW12:55 pmKey West
Oct 31
EYW11:22 amKey West
10h 36m
1 stop
SFO6:58 pmSan Francisco
$274
Find similar
American Airlines
Oct 25
SFO11:25 pmSan Francisco
10h 30m
2 stops
EYW12:55 pmKey West
Oct 31
EYW11:22 amKey West
13h 34m
2 stops
SFO9:56 pmSan Francisco
$279
Find similar

United Airlines flights from San Francisco to Key West

Our best United Airlines deals on San Francisco to Key West flight tickets
United Airlines
Dec 30
SFO11:55 pmSan Francisco
11h 18m
1 stop
EYW2:13 pmKey West
Jan 8
EYW12:23 pmKey West
11h 02m
1 stop
SFO8:25 pmSan Francisco
$434
Find similar
United Airlines
Jan 3
SFO5:15 amSan Francisco
8h 03m
1 stop
EYW4:18 pmKey West
Jan 8
EYW4:50 pmKey West
10h 05m
1 stop
SFO11:55 pmSan Francisco
$474
Find similar
United Airlines
Dec 24
SFO5:15 amSan Francisco
8h 03m
1 stop
EYW4:18 pmKey West
Dec 25
EYW4:10 pmKey West
10h 53m
1 stop
SFO12:03 amSan Francisco
$518
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Key West that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 21, 2025.
Use the filters below to find and compare flights from San Francisco to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Sat 10/25

10:00 pm-11:53 am

1 stop10h 53m

Key West

Fri 10/31

12:45 pm-11:54 pm

1 stop14h 09m

$259

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Mon 1/19

12:27 am-1:17 pm

1 stop9h 50m

Key West

Thu 1/29

3:49 pm-10:40 pm

1 stop9h 51m

$269

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Sat 10/25

11:55 pm-12:55 pm

2 stops10h 00m

Key West

Fri 10/31

11:22 am-6:58 pm

1 stop10h 36m

$274

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Sat 10/25

11:25 pm-12:55 pm

2 stops10h 30m

Key West

Fri 10/31

11:22 am-9:56 pm

2 stops13h 34m

$279

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Sat 10/4

11:25 pm-1:29 pm

2 stops11h 04m

Key West

Mon 10/6

2:32 pm-10:30 pm

2 stops10h 58m

$285

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Tue 10/14

7:15 am-8:06 pm

1 stop9h 51m

Key West

Thu 10/16

6:17 pm-11:56 pm

1 stop8h 39m

$289

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Thu 10/30

9:10 pm-11:53 am

1 stop11h 43m

Key West

Sun 11/2

12:45 pm-11:54 pm

1 stop14h 09m

$293

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Wed 11/26

8:30 am-7:44 pm

1 stop8h 14m

Key West

Thu 11/27

7:00 am-2:47 pm

1 stop10h 47m

$428

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Tue 12/30

11:55 pm-2:13 pm

1 stop11h 18m

Key West

Thu 1/8

12:23 pm-8:25 pm

1 stop11h 02m

$434

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Sat 1/3

5:15 am-4:18 pm

1 stop8h 03m

Key West

Thu 1/8

4:50 pm-11:55 pm

1 stop10h 05m

$474

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Key West from

How to get the cheapest flight ticket from San Francisco to Key West

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Key West?

In general, August is the cheapest month to fly from San Francisco to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $263. If you are unable to visit Key West during the month of August, then departing from San Francisco during the month September is also very affordable. Most momondo users find prices during this month for around $323.

What is the cheapest day to depart on your flight to Key West?

On average, the least expensive day to fly to Key West from San Francisco is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $391. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from San Francisco to Key West for around $642.

What is the cheapest time of day to depart on your flight to Key West?

According to our data, the cheapest time of day to fly to Key West is in the morning. momondo users have found flights departing from San Francisco to Key West in the morning for as low as $488. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Key West are more costly in the evening, with an average ticket price of $561. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Key West?

You are more likely to see cheaper flights to Key West from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Key West for around $476 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Key West from San Francisco for as low as $227 on momondo.

How have San Francisco to Key West flight prices changed over time?

As of August 2025, prices for San Francisco to Key West flights are approximately 22% cheaper when compared to flights at the same time last year.

When to book flights from San Francisco to Key West

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Key West according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Key West (SFO to EYW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Key West

Direct flights

None
There are no direct flights from San Francisco to Key West. There are no popular flight routes from San Francisco to Key West.
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  • How far is San Francisco to Key West by plane?

    Key West is 2543.6 mi away from San Francisco. Flights usually cover this in 7h 13m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from San Francisco Airport to Key West Airport?

    Prices for flights from San Francisco Airport to Key West Airport are updated daily.

  • How many operators does momondo search for flights from San Francisco Airport to Key West Airport?

  • How old do you have to be to fly from San Francisco Airport to Key West Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Key West Airport.

  • What documentation or ID do you need to fly to Key West Airport?

    The required travel and health documents for your Key West Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Key West Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from San Francisco to Key West?

Best airlines flying from San Francisco to Key West

Compare and see reviews for airlines that fly from San Francisco to Key West with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $256Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $268Free CancellationRating
7.9
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $287Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Big Pine Key
Little Torch Key

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Key West?

It is quick and easy to find San Francisco to Key West flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Key West that suits you.

Can I find flights from San Francisco to Key West with flexible booking policies on momondo?

Flights from San Francisco to Key West with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from San Francisco to Key West?

Once all potential San Francisco to Key West flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from San Francisco to Key West right now. Can momondo alert me if prices change?

Yes. momondo can track prices for San Francisco to Key West flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Key West trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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