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Grassy Key

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Grassy Key Flights as Low as $65

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

Spirit Airlines
Tue, May 6 - Thu, May 15
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$65 Roundtrip, found 4 hours ago
$65
Roundtrip
found 4 hours ago
Select Spirit Airlines flight, departing Tue, May 6 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, May 15, priced at $65 found 4 hours ago
Spirit Airlines
Tue, Apr 29 - Wed, Apr 30
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$68 Roundtrip, found 16 hours ago
$68
Roundtrip
found 16 hours ago
Select Spirit Airlines flight, departing Tue, Apr 29 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Wed, Apr 30, priced at $68 found 16 hours ago
Spirit Airlines
Wed, Apr 30 - Tue, May 6
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$73 Roundtrip, found 6 hours ago
$73
Roundtrip
found 6 hours ago
Select Spirit Airlines flight, departing Wed, Apr 30 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Tue, May 6, priced at $73 found 6 hours ago
Spirit Airlines
Tue, May 6 - Thu, May 15
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$75 Roundtrip, found 4 hours ago
$75
Roundtrip
found 4 hours ago
Select Spirit Airlines flight, departing Tue, May 6 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, May 15, priced at $75 found 4 hours ago
Spirit Airlines
Thu, May 29 - Thu, Jun 5
BOS
Logan Intl.
MIA
Miami Intl.
$80 Roundtrip, found 3 hours ago
$80
Roundtrip
found 3 hours ago
Select Spirit Airlines flight, departing Thu, May 29 from Logan Intl. to Miami Intl., returning Thu, Jun 5, priced at $80 found 3 hours ago
Frontier Airlines
Mon, Jun 2 - Fri, Jun 6
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$90 Roundtrip, found 9 hours ago
$90
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Mon, Jun 2 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Fri, Jun 6, priced at $90 found 9 hours ago
Frontier Airlines
Mon, May 5 - Wed, May 14
JFK
John F. Kennedy Intl.
MIA
Miami Intl.
$97 Roundtrip, found 2 hours ago
$97
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Mon, May 5 from John F. Kennedy Intl. to Miami Intl., returning Wed, May 14, priced at $97 found 2 hours ago
Delta
Tue, Jul 15 - Tue, Jul 15
BOS
Logan Intl.
MIA
Miami Intl.
$97 Roundtrip, found 6 days ago
$97
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Jul 15 from Logan Intl. to Miami Intl., returning Tue, Jul 15, priced at $97 found 6 days ago
JetBlue Airways
Wed, Jul 9 - Mon, Jul 14
BOS
Logan Intl.
MIA
Miami Intl.
$97 Roundtrip, found 6 days ago
$97
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Wed, Jul 9 from Logan Intl. to Miami Intl., returning Mon, Jul 14, priced at $97 found 6 days ago
Spirit Airlines
Wed, May 14 - Wed, May 21
ORD
O'Hare Intl.
MIA
Miami Intl.
$98 Roundtrip, found 2 days ago
$98
Roundtrip
found 2 days ago
Select Spirit Airlines flight, departing Wed, May 14 from O'Hare Intl. to Miami Intl., returning Wed, May 21, priced at $98 found 2 days ago
American Airlines
Fri, May 9 - Wed, May 14
JFK
John F. Kennedy Intl.
MIA
Miami Intl.
$147 Roundtrip, found 1 day ago
$147
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, May 9 from John F. Kennedy Intl. to Miami Intl., returning Wed, May 14, priced at $147 found 1 day ago
United
Wed, May 14 - Wed, May 21
ORD
O'Hare Intl.
MIA
Miami Intl.
$180 Roundtrip, found 2 days ago
$180
Roundtrip
found 2 days ago
Select United flight, departing Wed, May 14 from O'Hare Intl. to Miami Intl., returning Wed, May 21, priced at $180 found 2 days ago
American Airlines
Sat, May 31 - Wed, Jun 4
JFK
John F. Kennedy Intl.
EYW
Key West Intl.
$267 Roundtrip, found 1 day ago
$267
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, May 31 from John F. Kennedy Intl. to Key West Intl., returning Wed, Jun 4, priced at $267 found 1 day ago
Delta
Wed, May 14 - Tue, May 20
ORD
O'Hare Intl.
EYW
Key West Intl.
$271 Roundtrip, found 6 days ago
$271
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, May 14 from O'Hare Intl. to Key West Intl., returning Tue, May 20, priced at $271 found 6 days ago
JetBlue Airways
Thu, Jul 10 - Thu, Jul 17
BOS
Logan Intl.
EYW
Key West Intl.
$282 Roundtrip, found 6 days ago
$282
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Thu, Jul 10 from Logan Intl. to Key West Intl., returning Thu, Jul 17, priced at $282 found 6 days ago
American Airlines
Tue, Jun 24 - Wed, Jul 2
ATL
Hartsfield-Jackson Atlanta Intl.
EYW
Key West Intl.
$308 Roundtrip, found 11 hours ago
$308
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Tue, Jun 24 from Hartsfield-Jackson Atlanta Intl. to Key West Intl., returning Wed, Jul 2, priced at $308 found 11 hours 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 May, 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 Florida Keys Marathon 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 $65, 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 $65 right now, why wait?

Grassy Key Flight Information
Destination airport
Miami Intl.
Destination airport IATA code
MIA
Roundtrip price
$65

Last Minute Hotel Deals in Grassy Key

Rainbow Bend Resort
Rainbow Bend Resort
2.5 out of 5
57784 Overseas Hwy, Marathon, FL
The price is $168 per night from Apr 20 to Apr 21
$168
includes taxes & fees
Apr 20 - Apr 21
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 ...
8.2/10 Very Good! (613 reviews)
"Amazing trip"

Reviewed on Apr 16, 2025

Rainbow Bend Resort
Gulf View Waterfront Resort
Gulf View Waterfront Resort
2.5 out of 5
58743 OVERSEAS HWY, Marathon, FL
The price is $224 per night from Apr 27 to Apr 28
$224
includes taxes & fees
Apr 27 - Apr 28
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! (449 reviews)
"Good Value!!"

Reviewed on Apr 16, 2025

Gulf View Waterfront Resort
Grassy Flats Resort & Beach Club
Grassy Flats Resort & Beach Club
2.5 out of 5
58182 Overseas Hwy, Marathon, FL
The price is $378 per night from Apr 27 to Apr 28
$378
includes taxes & fees
Apr 27 - Apr 28
Book a stay at this beach hotel in Marathon. Enjoy free WiFi, free parking, and 2 outdoor pools. Our guests praise the helpful staff and the property condition ...
9.4/10 Exceptional! (265 reviews)
"beautiful rooms"

Reviewed on Apr 7, 2025

Grassy Flats Resort & Beach Club
Hawks Cay Resort
Hawks Cay Resort
4 out of 5
61 Hawks Cay Blvd, Marathon, FL
The price is $352 per night from Apr 27 to Apr 28
$352
includes taxes & fees
Apr 27 - Apr 28
Book a stay at this beach 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 ...
7.8/10 Good! (1,005 reviews)
"Beautiful property, restaurants close too early for later eaters."

Reviewed on Apr 8, 2025

Hawks Cay Resort
Isla Bella Beach Resort & Spa
Isla Bella Beach Resort & Spa
5 out of 5
1 Knights Key Boulevard, MM 47, Marathon, FL
The price is $319 per night from Apr 27 to Apr 28
$319
includes taxes & fees
Apr 27 - Apr 28
Stay at this 5-star 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 ...
9/10 Wonderful! (1,007 reviews)
"We had a wonderful family stay at Isla Bella! The grounds are fantastic, the views picturesque, and the room was comfortable for our family of four. We particularly loved the front porch with its cozy couch and table and chairs. Being on the ground level was great as our kids could come and go easily ..."

Reviewed on Apr 15, 2025

Isla Bella Beach Resort & Spa
Lime Tree Bay Resort
Lime Tree Bay Resort
3.5 out of 5
68500 Overseas Hwy, Long Key, FL
The price is $246 per night from May 15 to May 16
$246
includes taxes & fees
May 15 - May 16
Stay at this 3.5-star 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. ...
9.2/10 Wonderful! (1,058 reviews)
"It was all good"

Reviewed on Apr 12, 2025

Lime Tree Bay Resort
Faro Blanco Resort & Yacht Club Marathon, Curio by Hilton
Faro Blanco Resort & Yacht Club Marathon, Curio by Hilton
4 out of 5
1996 Overseas Highway, Marathon, FL
The price is $220 per night from May 18 to May 19
$220
includes taxes & fees
May 18 - May 19
Stay at this 4-star beach resort in Marathon. Enjoy free WiFi, 2 outdoor pools, and 4 restaurants. Our guests praise the breakfast and the pool in our reviews. ...
8.8/10 Excellent! (1,334 reviews)
"We had a great spring break trip! It’s hard to find a hotel that will accommodate a family of 6 without having to get two rooms. The room was fresh and updated. Staff was super friendly. My kids loved the different options for pools. I recommend the mai tai from the bar!"

Reviewed on Apr 14, 2025

Faro Blanco Resort & Yacht Club Marathon, Curio by Hilton
Tranquility Bay Beachfront Hotel and Resort
Tranquility Bay Beachfront Hotel and Resort
4 out of 5
2600 Overseas Hwy, Marathon, FL
The price is $364 per night from Apr 28 to Apr 29
$364
includes taxes & fees
Apr 28 - Apr 29
Stay at this 4-star beach hotel in Marathon. Enjoy free WiFi, free parking, and 3 outdoor pools. Our guests praise the pool and the helpful staff in our reviews. ...
8.8/10 Excellent! (1,001 reviews)
"All of it."

Reviewed on Apr 12, 2025

Tranquility Bay Beachfront Hotel and Resort
See all 2,222 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.