Cheap Flights to Grassy Key

View ₩105,100 flight on Sat, Jan 10, 2026Opens in a new window

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How much is the cheapest flight to Grassy Key?

Prices were available within the past 7 days and start at ₩105,100 for one-way flights and ₩210,700 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Jan 8 - Fri, Jan 9
EWR
New York
MIA
Miami
₩210,700 Roundtrip, found 2 days ago
₩210,700
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Jan 8 from New York to Miami, returning Fri, Jan 9, priced at ₩210,700 found 2 days ago
United
Thu, Jan 8 - Fri, Jan 9
EWR
New York
MIA
Miami
₩255,400 Roundtrip, found 2 days ago
₩255,400
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jan 8 from New York to Miami, returning Fri, Jan 9, priced at ₩255,400 found 2 days ago
American Airlines
Tue, Jan 6 - Wed, Jan 7
EWR
New York
MIA
Miami
₩299,900 Roundtrip, found 2 days ago
₩299,900
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Jan 6 from New York to Miami, returning Wed, Jan 7, priced at ₩299,900 found 2 days ago
Hawaiian Airlines
Sat, Feb 7 - Tue, Feb 17
ICN
Seoul
MIA
Miami
₩846,100 Roundtrip, found 6 days ago
₩846,100
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Sat, Feb 7 from Seoul to Miami, returning Tue, Feb 17, priced at ₩846,100 found 6 days ago
Air Canada
Fri, Feb 6 - Wed, Feb 25
ICN
Seoul
MIA
Miami
₩1,277,800 Roundtrip, found 15 hours ago
₩1,277,800
Roundtrip
found 15 hours ago
Select Air Canada flight, departing Fri, Feb 6 from Seoul to Miami, returning Wed, Feb 25, priced at ₩1,277,800 found 15 hours ago

Searching for cheap flights to Grassy Key? No travel company presents more choices than Expedia if you're looking to compare flights to Grassy Key. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Marathon. Expedia provides the cheapest flights to many destinations in Marathon and you may find even greater savings if you combine your flight with a hotel stay in Grassy Key.

Frequently asked questions

How do I find cheap flights to Grassy Key that have flexible change policies?
When it comes to traveling these days, flexibility is key. That's why we have a "No change fee" filter to help you find flexible, cheap flights to Grassy Key. It's on the left of your screen directly underneath the "Flexible change policies" heading.
Which airlines fly to Grassy Key?
With a good range of airlines flying into or near Grassy Key, you're spoiled for choice:

  • American Airlines - 5,497 flights to or near Grassy Key each month, including 5,223 flights to Miami Intl. Airport (MIA) per month.
  • Delta Air Lines - 975 flights to or near Grassy Key each month, including 853 flights to Miami Intl. Airport (MIA) per month.
  • Spirit Airlines - 577 flights to or near Grassy Key each month, including 577 flights to Miami Intl. Airport (MIA) per month.

How can I find cheap tickets to Grassy Key?
You'll always find an amazing deal with Expedia, but our "flexible dates" feature makes it even easier. Enter your preferred travel date, then check the flexible dates box above to see a list of prices for nearby days. ₩210,700 was the cheapest price for a flight to Grassy Key in the last seven days.
How much is a flight to Grassy Key?
The price of a round-trip ticket to Grassy Key in the last seven days ranged between ₩210,700 and ₩1,277,800. If you were heading one way from New York (EWR), you could have purchased a fare from just ₩105,100.
What are the most popular airports to fly into in Grassy Key?
When it comes to selecting which Grassy Key airport to jet into, here are your options:

  • Miami Intl. Airport (MIA) - 7,981 flights per month.
  • Key West Intl. Airport (EYW) - 624 flights per month.

When is the cheapest time to fly to Grassy Key?
Jet off on a Tuesday to improve your chances of getting the cheapest flight to Grassy Key. Mondays are usually the next most affordable day to depart. Saturday is normally the costliest day to fly anywhere.
How much is a plane ticket to Grassy Key?
In the last seven days, tickets to Grassy Key fluctuated between ₩210,700 and ₩1,277,800. Prices usually rise as your travel date nears, so land yourself a bargain today.
What months are the cheapest to book a flight to Grassy Key?
Snap up your ticket in February to enjoy the lowest-priced flights to Grassy Key. December is often the most expensive time to purchase a fare.
Flights to Grassy Key information
Destination airport
Miami Intl.
Destination airport IATA code
MIA
Destination city name
Miami
Roundtrip price
₩210,700

Trending flights to Grassy Key

Prices were available within the past 7 days and start at ₩105,100 for one-way flights and ₩210,700 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Sat, Feb 7 - Tue, Feb 17
ICN
Seoul
MIA
Miami
₩846,100 Roundtrip, found 6 days ago
₩846,100
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Sat, Feb 7 from Seoul to Miami, returning Tue, Feb 17, priced at ₩846,100 found 6 days ago
*Available to Expedia members.