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Grassy Key

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Grassy Key Flights as Low as $58

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Frontier Airlines
Mon, Nov 9 - Thu, Nov 12
BWI
Baltimore Washington Intl. Thurgood Marshall
MIA
Miami Intl.
$58 Roundtrip, found 4 hours ago
$58
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Mon, Nov 9 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Thu, Nov 12, priced at $58 found 4 hours ago
Frontier Airlines
Tue, Nov 3 - Thu, Nov 12
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$68 Roundtrip, found 2 hours ago
$68
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Tue, Nov 3 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, Nov 12, priced at $68 found 2 hours ago
Frontier Airlines
Sun, Nov 15 - Wed, Dec 2
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$74 Roundtrip, found 2 hours ago
$74
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sun, Nov 15 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Wed, Dec 2, priced at $74 found 2 hours ago
American Airlines
Sat, Jan 30 - Sat, Feb 6
DCA
Ronald Reagan Washington National
MIA
Miami Intl.
$117 Roundtrip, found 1 day ago
$117
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Jan 30 from Ronald Reagan Washington National to Miami Intl., returning Sat, Feb 6, priced at $117 found 1 day ago
Southwest Airlines
Sat, Dec 5 - Tue, Dec 8
BWI
Baltimore Washington Intl. Thurgood Marshall
MIA
Miami Intl.
$127 Roundtrip, found 1 day ago
$127
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Sat, Dec 5 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Tue, Dec 8, priced at $127 found 1 day ago
Delta
Sat, Jan 30 - Sat, Feb 6
DCA
Ronald Reagan Washington National
MIA
Miami Intl.
$137 Roundtrip, found 1 day ago
$137
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Jan 30 from Ronald Reagan Washington National to Miami Intl., returning Sat, Feb 6, priced at $137 found 1 day ago
United
Sat, Dec 5 - Tue, Dec 8
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$227 Roundtrip, found 2 hours ago
$227
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Dec 5 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Tue, Dec 8, priced at $227 found 2 hours ago
JetBlue Airways
Mon, Nov 9 - Tue, Dec 1
ATL
Hartsfield-Jackson Atlanta Intl.
AVT
Aventura Brightline Train Station
$272 Roundtrip, just found
$272
Roundtrip
just found
Select JetBlue Airways flight, departing Mon, Nov 9 from Hartsfield-Jackson Atlanta Intl. to Aventura Brightline Train Station, returning Tue, Dec 1, priced at $272 just found
JetBlue Airways
Tue, Jan 5 - Fri, Jan 8
ATL
Hartsfield-Jackson Atlanta Intl.
EKW
Miami Central Brightline Train Station
$272 Roundtrip, found 3 days ago
$272
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Tue, Jan 5 from Hartsfield-Jackson Atlanta Intl. to Miami Central Brightline Train Station, returning Fri, Jan 8, priced at $272 found 3 days ago
JetBlue Airways
Wed, Nov 4 - Wed, Nov 4
BWI
Baltimore Washington Intl. Thurgood Marshall
AVT
Aventura Brightline Train Station
$331 Roundtrip, found 3 days ago
$331
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Wed, Nov 4 from Baltimore Washington Intl. Thurgood Marshall to Aventura Brightline Train Station, returning Wed, Nov 4, priced at $331 found 3 days ago
JetBlue Airways
Tue, Dec 8 - Wed, Dec 9
DCA
Ronald Reagan Washington National
AVT
Aventura Brightline Train Station
$341 Roundtrip, found 4 days ago
$341
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Tue, Dec 8 from Ronald Reagan Washington National to Aventura Brightline Train Station, returning Wed, Dec 9, priced at $341 found 4 days ago
JetBlue Airways
Wed, Feb 10 - Sat, Feb 13
BWI
Baltimore Washington Intl. Thurgood Marshall
EKW
Miami Central Brightline Train Station
$352 Roundtrip, found 4 days ago
$352
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Wed, Feb 10 from Baltimore Washington Intl. Thurgood Marshall to Miami Central Brightline Train Station, returning Sat, Feb 13, priced at $352 found 4 days ago
American Airlines
Tue, Apr 13 - Tue, Apr 20
BWI
Baltimore Washington Intl. Thurgood Marshall
EYW
Key West Intl.
$353 Roundtrip, found 2 days ago
$353
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Apr 13 from Baltimore Washington Intl. Thurgood Marshall to Key West Intl., returning Tue, Apr 20, priced at $353 found 2 days ago
Delta
Sun, Feb 14 - Thu, Feb 25
ATL
Hartsfield-Jackson Atlanta Intl.
EYW
Key West Intl.
$369 Roundtrip, just found
$369
Roundtrip
just found
Select Delta flight, departing Sun, Feb 14 from Hartsfield-Jackson Atlanta Intl. to Key West Intl., returning Thu, Feb 25, priced at $369 just found
JetBlue Airways
Wed, Nov 4 - Wed, Nov 11
DCA
Ronald Reagan Washington National
EKW
Miami Central Brightline Train Station
$374 Roundtrip, found 5 days ago
$374
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Wed, Nov 4 from Ronald Reagan Washington National to Miami Central Brightline Train Station, returning Wed, Nov 11, priced at $374 found 5 days ago
Delta
Fri, Jan 8 - Thu, Jan 14
DCA
Ronald Reagan Washington National
EYW
Key West Intl.
$379 Roundtrip, found 3 days ago
$379
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Jan 8 from Ronald Reagan Washington National to Key West Intl., returning Thu, Jan 14, priced at $379 found 3 days ago

Cheap Flights to Grassy Key

Fall in love at first flight with your vacation to Grassy Key by saving a ton of cash on your last-minute cheap flight. There’s no more scouring the internet for a good deal—book your flight to Grassy Key on Hotwire, and you’ll be up, up, and on a getaway in no time.

Because once the wheels are down in Grassy Key, the good times start rolling. So buckle up, you’re in for a fun ride.

Frequently Asked Questions About flights to Grassy Key

Don’t waste your time on endless searches for cheap airline tickets oneway or roundtrip. We’ll have you on your way to Grassy Key with a tiny bag of pretzels in your hand before you can say “tray tables in the upright position”—and for a ticket price that works for your vacay budget.

So all you have to worry about is where you’re headed after the MIA airport.

What is the cheapest month to fly to Grassy Key?

Airline ticket prices fluctuate all the time, depending on the day of the week or the month of the year. The cheapest round trip flights to Grassy Key are in November, but when you book your flight on Hotwire, savings are always in season.

How many airlines fly to Grassy Key?

Variety is the spice of life, even when it comes to booking your next trip. Want options for airlines? You’ll find 16 to choose from for your flight to Grassy Key.

What airport is best to fly into Grassy Key?

When you’re planning your trip to Grassy Key, convenience is the name of the game. Luckily, Grassy Key Key West Intl. Airport is nearby so you can deplane and get going on checking off everything on your Grassy Key must-do list.

How much are flights to Grassy Key?

Got very cheap flights on your vacation itinerary? When you book your airline tickets to Grassy Key on Hotwire, you may just get what’s on your getaway wish list. With tickets as low as $58, you’ll have leftover cash for at least a magazine and a bottle of water at the airport book store.

How to get cheap flights to Grassy Key?

The trick to saving a stack of cash on your flight to Grassy Key? Snatch up that Hotwire flight deal when you see a killer rate because it could be gone in a flash. And with flights as low as $58 right now, why wait?

Grassy Key Flight Information
Destination airport
Miami Intl.
Destination airport IATA code
MIA
Roundtrip price
$68

Last Minute Hotel Deals in Grassy Key

Rainbow Bend Resort

Rainbow Bend Resort

2.5 out of 5
57784 Overseas Hwy Marathon FL
Book a stay at this beach hotel in Marathon. Enjoy a private beach, daily housekeeping, and a garden. Our guests praise the breakfast and the helpful staff in ...
Get rates
Rainbow Bend Resort
Gulf View Waterfront Resort

Gulf View Waterfront Resort

2.5 out of 5
58743 OVERSEAS HWY Marathon FL
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and daily housekeeping. Our guests praise the helpful staff and the clean rooms in our reviews. ...
8.4/10 Very Good! (633 reviews)
"This was a really cute place to stay. Only complaint I have is our bathroom was incredibly small and slightly dirty still and the beds had others peoples hair in them which is pretty off-putting. I’m not super grossed out bc i just assume the mop left things behind or the hair just got tangled up ..."

Reviewed on Oct 15, 2026

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Gulf View Waterfront Resort
Grassy Flats Resort & Beach Club

Grassy Flats Resort & Beach Club

4 out of 5
58182 Overseas Hwy Marathon FL
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and 2 outdoor pools. Our guests praise the helpful staff and the property condition in our reviews. ...
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Grassy Flats Resort & Beach Club
Isla Bella Beach Resort & Spa

Isla Bella Beach Resort & Spa

5 out of 5
1 Knights Key Boulevard Marathon FL
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 5 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
9.2/10 Wonderful! (1,292 reviews)
"We had a great visit! Amazing property, welcoming and kind staff and comfortable room."

Reviewed on Oct 16, 2026

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Isla Bella Beach Resort & Spa
Lime Tree Bay Resort

Lime Tree Bay Resort

3.5 out of 5
68500 Overseas Hwy Long Key FL
Book a stay at this beach resort in Long Key. Enjoy free WiFi, free parking, and 3 outdoor pools. Our guests praise the pool and the helpful staff in our reviews. ...
9.4/10 Exceptional! (1,543 reviews)
"What to say really. We had a n absolute nightmare of a day on our way down to the hotel. We were due to land at Key West at 1200 but that turned into landing in Miami and then an 8 hour delay before finally touching down. The staff at the hotel were great contacting us throughout the day and being ..."

Reviewed on Oct 16, 2026

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Lime Tree Bay Resort
Hawks Cay Resort

Hawks Cay Resort

4 out of 5
61 Hawks Cay Blvd Marathon FL
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 3 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
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Hawks Cay Resort
Kingsail Resort

Kingsail Resort

2 out of 5
7050 Overseas Highway Marathon FL
Stay at this motel in Marathon. Enjoy free WiFi, free parking, and a marina. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
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Kingsail Resort
Faro Blanco Resort Marathon Florida Keys, Curio by Hilton

Faro Blanco Resort Marathon Florida Keys, Curio by Hilton

4 out of 5
1996 Overseas Highway Marathon FL
Book a stay at this spa resort in Marathon. Enjoy free WiFi, 4 outdoor pools, and a full-service spa. Our guests praise the pool and the restaurant in our reviews. ...
8.6/10 Excellent! (1,157 reviews)
"As soon as we"

Reviewed on Oct 14, 2026

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Faro Blanco Resort Marathon Florida Keys, Curio by Hilton
See all 2,360 properties in Grassy Key
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.