Cheap Flights from San Francisco (SFO) to Marathon (MTH)

Popular airlines from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon)

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Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon) cost?
Secure a cheap one-way flight or cheap return flight from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon)?
The cheapest month to fly from SFO to MTH is , when there's less demand. Off-peak months are generally when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest SFO to MTH flight.
How many flights per day from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon)?
You'll have to book a flight with a layover when traveling from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from SFO to MTH?
Typically you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* But this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon)?
To reach Marathon, FL (MTH-Florida Keys Marathon) on time, choose a flight that leaves San Francisco Intl. Airport (SFO) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon) last-minute?
Booking your flight from SFO to MTH right before your journey is typically more expensive. But if you're flexible with your departure dates and times, you could land a cheap last-minute fare.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Marathon, FL (MTH-Florida Keys Marathon)?
If you reserved your SFO to MTH flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more information.

Travel information

Origin airport
San Francisco Intl.
Destination airport
Florida Keys Marathon
Distance
2576 mi

Book with confidence

San Francisco to Marathon Flights

The cheapest times to fly from San Francisco to Marathon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to Marathon are during the month of . You can find some of the cheapest flights from San Francisco to Marathon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to Marathon

Sunday is one of the best days to book for cheap flights from San Francisco to Marathon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Francisco to Marathon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to Marathon in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to Marathon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to Marathon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Francisco to Marathon Flights

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*Available to One Key members.