HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Key West

$198+ Cheap flights from San Francisco to Key West (SFO - EYW)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — EYW
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Francisco to Key West with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from San Francisco to Key West are usually found in August or September, booked 51 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from San Francisco to Key West

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Key West (EYW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$309
(American Airlines)

One-way from

$198
(Kiwi.com)

Popular in

June

Cheapest in

August

Average price

$348
From San Francisco to Key West
Search Deals
One-way flight from San Francisco to Key West
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($6 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from San Francisco to Key West

Cheapest flights from San Francisco to Key West
Explore the most affordable flight options available from San Francisco to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/29:00 amSFO - EYW
1 stop9h 48mAmerican Airlines
Tue 12/167:30 amEYW - SFO
1 stop9h 07mAmerican Airlines
Deal found 9/10$334
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:00 amSFO - EYW
1 stop8h 46mAmerican Airlines
Fri 10/33:45 pmEYW - SFO
1 stop9h 05mAmerican Airlines
Deal found 9/10$374
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:15 amSFO - EYW
2 stops10h 29mAmerican Airlines
Wed 12/312:30 pmEYW - SFO
1 stop8h 14mAmerican Airlines
Deal found 9/10$394
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1111:56 pmSFO - EYW
1 stop9h 14mAmerican Airlines
Wed 10/152:32 pmEYW - SFO
1 stop9h 07mAmerican Airlines
Deal found 9/10$409
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:00 amSFO - EYW
1 stop7h 13mAmerican Airlines
Sun 11/24:53 pmEYW - SFO
1 stop8h 57mAmerican Airlines
Deal found 9/10$446
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2011:05 pmSFO - EYW
1 stop10h 15mUnited Airlines
Thu 12/255:00 pmEYW - SFO
1 stop10h 21mUnited Airlines
Deal found 9/10$450

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from San Francisco to Key West that are best for you.

Fly from

San Francisco

Fly to

Key West

Route

Depart

Return

Price

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Tue 12/2

9:00 am-9:48 pm

1 stop9h 48m

Key West

Tue 12/16

7:30 am-1:37 pm

1 stop9h 07m

$334

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Fri 9/26

6:00 am-5:46 pm

1 stop8h 46m

Key West

Fri 10/3

3:45 pm-9:50 pm

1 stop9h 05m

$374

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Thu 10/30

6:22 am-7:22 pm

2 stops10h 00m

Key West

Sun 11/2

2:50 pm-10:50 pm

1 stop11h 00m

$451

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Wed 11/19

9:00 am-9:48 pm

1 stop9h 48m

Key West

Thu 11/27

11:44 am-9:00 pm

1 stop12h 16m

$477

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Wed 10/1

5:45 am-6:59 pm

2 stops10h 14m

Key West

Thu 10/9

5:47 pm-10:59 pm

1 stop8h 12m

$502

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Thu 10/30

12:50 am-5:16 pm

2 stops13h 26m

Key West

Sun 11/2

2:50 pm-10:50 pm

1 stop11h 00m

$516

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Thu 10/9

5:45 am-9:17 am

2 stops24h 32m

$198

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Wed 11/26

6:00 am-3:45 pm

3 stops30h 45m

$341

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Wed 11/26

8:00 am-7:23 pm

1 stop8h 23m

$343

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Fri 10/31

8:15 am-8:06 pm

1 stop8h 51m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 12 results
1
2

Best time to book a flight from San Francisco to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from San Francisco with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Key West

How far ahead should I book a flight from San Francisco to Key West?

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Key West. Price data was last updated on August 29, 2025.

The best time to book flights from San Francisco to Key West is 50 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Francisco to Key West?

Currently, August is the cheapest month in which you can book a flight from San Francisco to Key West (average of $328). Flying from San Francisco to Key West in March is currently the most expensive (average of $491). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to EYW?

Find hourly flight availability from San Francisco to Key West. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from San Francisco to Key West in the morning. If you’re flexible enough to do this you can expect to save up to 14% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Key West

Get insights into the airlines that provide service to Key West. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Key West. Reviews last updated September 11, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from San Francisco to Key West by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Key West. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from San Francisco to Key West?

    For as low as $334, American Airlines can have you in Key West from San Francisco in 9h 48m. The distance from San Francisco to Key West is about 2542 mi.

  • What are the cheapest airlines flying from San Francisco to Key West round-trip?

    Cheapflights users have booked flights from San Francisco to Key West round-trip from $256. Other airlines that can offer you cheap pricing are Delta, from $268, and United Airlines, from $287. Users have found that American Airlines is 46% cheaper than the other options available to this destination.

  • Can I find deals for flights from San Francisco to Key West that include hotel bookings?

    Yes. In addition to deals on San Francisco to Key West flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Key West?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Key West.

  • Can I find deals for business class flights from San Francisco to Key West?

    Yes. Cheapflights offers flight deals from San Francisco to Key West by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Key West?

    Currently, August is the cheapest month in which you can book a flight from San Francisco to Key West (average of $328). Flying from San Francisco to Key West in March is currently the most expensive (average of $491). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Key West

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Miami flights
Los Angeles to Orlando flights
Los Angeles to Fort Lauderdale flights
San Francisco to Miami flights
San Francisco to Orlando flights
Los Angeles to Tampa flights
Ontario to Miami flights
Burbank to Fort Lauderdale flights
Ontario to Orlando flights
Santa Ana to Fort Lauderdale flights
San Francisco to Tampa flights
San Diego to Orlando flights
San Francisco to Fort Lauderdale flights
Las Vegas to Orlando flights
Santa Ana to Orlando flights
Las Vegas to Fort Lauderdale flights
San Diego to Miami flights
Ontario to Fort Lauderdale flights
Burbank to Orlando flights
Santa Ana to Miami flights
Burbank to Miami flights
Sacramento to Orlando flights
Las Vegas to Tampa flights
Las Vegas to Miami flights
San Jose to Miami flights
San Diego to Tampa flights
San Jose to Orlando flights
San Diego to Fort Lauderdale flights
Los Angeles to West Palm Beach flights
Ontario to Tampa flights
Santa Ana to Tampa flights
Sacramento to Miami flights
San Francisco to West Palm Beach flights
Sacramento to Tampa flights
Oakland to Miami flights
Burbank to Tampa flights
Sacramento to Fort Lauderdale flights
Oakland to Orlando flights
San Francisco to Fort Myers flights
San Jose to Fort Lauderdale flights
Los Angeles to Jacksonville flights
Los Angeles to Sarasota flights
San Francisco to Jacksonville flights
San Diego to Fort Myers flights
Oakland to Tampa flights
Los Angeles to Fort Myers flights
Los Angeles to Pensacola flights
Ontario to West Palm Beach flights
Fresno to Orlando flights
Oakland to Fort Lauderdale flights

Top 3 airlines flying from San Francisco to Key West

Discover the top 3 airlines that operate flights from San Francisco to Key West. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$256Average$449FlexibilityNo cancel feeOn-time71%
DeltaCheapest$268Average$496FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$287Average$619FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.