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$140+ 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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — EYW
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from San Francisco to Key West are usually found in August or September, booked 50 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 June 12, 2025.

Round-trip from

$259
(American Airlines)

One-way from

$140
(Delta)

Popular in

June

Cheapest in

August

Average price

$713
From San Francisco to Key West
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One-way flight from San Francisco to Key West
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Highest demand for flights based on searches. 2% potential increase in price ($10 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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 8/85:15 amSFO - EYW
1 stop8h 31mAmerican Airlines
Mon 8/1111:26 amEYW - SFO
1 stop10h 34mAmerican Airlines
Deal found 6/11$259
This Delta deal was found by Cheapflights users on 6/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/410:59 pmSFO - EYW
1 stop8h 52mDelta
Fri 8/86:27 pmEYW - SFO
1 stop9h 13mDelta
Deal found 6/9$284
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 10/309:30 pmSFO - EYW
1 stop11h 45mUnited Airlines
Sun 11/26:45 pmEYW - SFO
1 stop27h 57mUnited Airlines
Deal found 6/10$465
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/96:14 pmSFO - EYW
2 stops19h 31mMultiple Airlines
Wed 7/1610:02 amEYW - SFO
3 stops39h 51mMultiple Airlines
Deal found 6/10$613

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 June 12, 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

Fri 8/8

5:15 am-4:46 pm

1 stop8h 31m

Key West

Mon 8/11

11:26 am-7:00 pm

1 stop10h 34m

$259

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Mon 8/4

10:59 pm-10:51 am

1 stop8h 52m

Key West

Fri 8/8

6:27 pm-12:40 am

1 stop9h 13m

$284

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Fri 8/29

12:43 am-6:05 pm

2 stops14h 22m

Key West

Tue 9/2

8:45 am-12:19 pm

2 stops30h 34m

$476

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Wed 7/9

6:14 pm-4:45 pm

2 stops19h 31m

Key West

Wed 7/16

10:02 am-10:53 pm

3 stops39h 51m

$613

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Tue 7/22

7:45 am-7:49 pm

1 stop9h 04m

$140

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Tue 7/22

5:23 am-7:21 pm

2 stops10h 58m

$145

San FranciscoKey West

SFO - EYW

SFOEYW

San Francisco

Fri 7/25

8:45 pm-6:05 pm

1 stop18h 20m

$252

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 9, 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 $493). 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 June 12, 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.

Rainfall in Key West by month

Plan your trip to Key West by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key West ranges from 1.5 - 6.7 inches per month. September is typically the wettest month, when rainfall can reach 6.7 in. February is typically the driest time to visit Key West when rainfall is around 1.5 in.

Temperature in Key West by month

Plan your trip to Key West by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key West, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 69.8 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from San Francisco to Key West, such as Delta, United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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.

  • 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 $259. Other airlines that can offer you cheap pricing are Delta, from $284, and United Airlines, from $476. Users have found that American Airlines is 46% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from San Francisco to Key West one-way?

    One-way options have recently been found by users for as low as $140 on Delta. Other airlines that offer cheap prices include American Airlines from $145 and United Airlines from $252 one-way.

  • 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 $493). 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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$250Average$453FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$256Average$546FlexibilityNo cancel feeOn-time69%
DeltaCheapest$273Average$496FlexibilityNo cancel feeOn-timeN/A

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