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Grassy Key

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Grassy Key Flights as Low as $48

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

Frontier Airlines
Tue, Feb 25 - Tue, Mar 4
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$48 Roundtrip, found 1 hour ago
$48
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Feb 25 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Tue, Mar 4, priced at $48 found 1 hour ago
Frontier Airlines
Wed, Feb 12 - Tue, Feb 18
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$53 Roundtrip, found 1 day ago
$53
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Feb 12 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Tue, Feb 18, priced at $53 found 1 day ago
Spirit Airlines
Fri, Mar 21 - Tue, Apr 1
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$66 Roundtrip, found 19 hours ago
$66
Roundtrip
found 19 hours ago
Select Spirit Airlines flight, departing Fri, Mar 21 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Tue, Apr 1, priced at $66 found 19 hours ago
Frontier Airlines
Mon, Feb 10 - Thu, Feb 13
BWI
Baltimore Washington Intl. Thurgood Marshall
MIA
Miami Intl.
$68 Roundtrip, found 1 hour ago
$68
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Mon, Feb 10 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Thu, Feb 13, priced at $68 found 1 hour ago
Frontier Airlines
Wed, Mar 12 - Wed, Mar 19
DFW
Dallas-Fort Worth Intl.
MIA
Miami Intl.
$70 Roundtrip, found 1 hour ago
$70
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Mar 12 from Dallas-Fort Worth Intl. to Miami Intl., returning Wed, Mar 19, priced at $70 found 1 hour ago
Spirit Airlines
Tue, Feb 25 - Tue, Feb 25
DTW
Detroit Metropolitan Wayne County
MIA
Miami Intl.
$96 Roundtrip, found 3 days ago
$96
Roundtrip
found 3 days ago
Select Spirit Airlines flight, departing Tue, Feb 25 from Detroit Metropolitan Wayne County to Miami Intl., returning Tue, Feb 25, priced at $96 found 3 days ago
Delta
Tue, Mar 18 - Tue, Mar 25
DTW
Detroit Metropolitan Wayne County
MIA
Miami Intl.
$179 Roundtrip, found 23 hours ago
$179
Roundtrip
found 23 hours ago
Select Delta flight, departing Tue, Mar 18 from Detroit Metropolitan Wayne County to Miami Intl., returning Tue, Mar 25, priced at $179 found 23 hours ago
American Airlines
Tue, Mar 18 - Tue, Mar 25
DTW
Detroit Metropolitan Wayne County
MIA
Miami Intl.
$179 Roundtrip, found 23 hours ago
$179
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Tue, Mar 18 from Detroit Metropolitan Wayne County to Miami Intl., returning Tue, Mar 25, priced at $179 found 23 hours ago
Delta
Mon, Feb 24 - Tue, Feb 25
DAL
Love Field
MIA
Miami Intl.
$219 Roundtrip, found 3 days ago
$219
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Feb 24 from Love Field to Miami Intl., returning Tue, Feb 25, priced at $219 found 3 days ago
United
Wed, Mar 5 - Tue, Mar 18
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$219 Roundtrip, found 18 hours ago
$219
Roundtrip
found 18 hours ago
Select United flight, departing Wed, Mar 5 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Tue, Mar 18, priced at $219 found 18 hours ago
JetBlue Airways
Sun, May 25 - Thu, May 29
DTW
Detroit Metropolitan Wayne County
MIA
Miami Intl.
$267 Roundtrip, found 2 days ago
$267
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sun, May 25 from Detroit Metropolitan Wayne County to Miami Intl., returning Thu, May 29, priced at $267 found 2 days ago
Delta
Tue, Apr 8 - Mon, Apr 14
ATL
Hartsfield-Jackson Atlanta Intl.
EYW
Key West Intl.
$339 Roundtrip, found 9 hours ago
$339
Roundtrip
found 9 hours ago
Select Delta flight, departing Tue, Apr 8 from Hartsfield-Jackson Atlanta Intl. to Key West Intl., returning Mon, Apr 14, priced at $339 found 9 hours ago
American Airlines
Wed, Feb 12 - Sat, Feb 15
DTW
Detroit Metropolitan Wayne County
EYW
Key West Intl.
$364 Roundtrip, found 5 days ago
$364
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Feb 12 from Detroit Metropolitan Wayne County to Key West Intl., returning Sat, Feb 15, priced at $364 found 5 days ago
American Airlines
Tue, Feb 4 - Thu, Feb 6
BWI
Baltimore Washington Intl. Thurgood Marshall
EYW
Key West Intl.
$409 Roundtrip, found 4 days ago
$409
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Feb 4 from Baltimore Washington Intl. Thurgood Marshall to Key West Intl., returning Thu, Feb 6, priced at $409 found 4 days ago
Delta
Tue, Feb 18 - Wed, Feb 26
DAL
Love Field
EYW
Key West Intl.
$590 Roundtrip, found 5 days ago
$590
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Feb 18 from Love Field to Key West Intl., returning Wed, Feb 26, priced at $590 found 5 days ago
American Airlines
Tue, Feb 18 - Mon, Feb 24
DFW
Dallas-Fort Worth Intl.
EYW
Key West Intl.
$644 Roundtrip, found 5 days ago
$644
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Feb 18 from Dallas-Fort Worth Intl. to Key West Intl., returning Mon, Feb 24, priced at $644 found 5 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 February, 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 $48, 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 $48 right now, why wait?

Grassy Key Flight Information
Destination airport
Miami Intl.
Destination airport IATA code
MIA
Roundtrip price
$48

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 $489 per night from Feb 22 to Feb 23
$489
includes taxes & fees
Feb 22 - Feb 23
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! (560 reviews)
"Would stay again"

Reviewed on Jan 19, 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 Jan 27 to Jan 28
$224
includes taxes & fees
Jan 27 - Jan 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. ...
8.6/10 Excellent! (406 reviews)
"All was great,, good place to relax and enjoy your time off"

Reviewed on Jan 22, 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 $392 per night from Jan 29 to Jan 30
$392
includes taxes & fees
Jan 29 - Jan 30
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! (224 reviews)
"This is a top notch resort! Terrific staff, beautiful accommodations, great restaurant and bars, lovely pools (2) and hot tub, so many sport options, and just a very relaxing but fun place to be. Loved our vacation, we stayed a week. And because it’s in the middle of the Keys, we could get around ..."

Reviewed on Jan 22, 2025

Grassy Flats Resort & Beach Club
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 $445 per night from Jan 29 to Jan 30
$445
includes taxes & fees
Jan 29 - Jan 30
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! (1,002 reviews)
"Very pretty. Quiet. Walkout to beach area from my room."

Reviewed on Jan 21, 2025

Isla Bella Beach Resort & Spa
Kingsail Resort
Kingsail Resort
2 out of 5
7050 Overseas Highway, Marathon, FL
The price is $169 per night from Jan 27 to Jan 28
$169
includes taxes & fees
Jan 27 - Jan 28
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 ...
8.2/10 Very Good! (1,000 reviews)
"Overall, an absolutely charming little property. The local chickens were a nice touch, atmosphere was good, and the room was excellent. My only issue was my first night I locked the deadbolt, and when I woke up, the lock wouldn’t unlock for a good 5 minutes of trying"

Reviewed on Jan 20, 2025

Kingsail Resort
Coconut Cay Resort & Marina
Coconut Cay Resort & Marina
2 out of 5
7196 Overseas Highway, Marathon, FL
The price is $208 per night from Jan 27 to Jan 28
$208
includes taxes & fees
Jan 27 - Jan 28
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and a marina. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
8.4/10 Very Good! (1,001 reviews)
"Nice place. Very friendly staff!"

Reviewed on Jan 22, 2025

Coconut Cay Resort & Marina
Lime Tree Bay Resort
Lime Tree Bay Resort
3.5 out of 5
68500 Overseas Hwy, Long Key, FL
The price is $212 per night from Jan 30 to Jan 31
$212
includes taxes & fees
Jan 30 - Jan 31
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! (1,026 reviews)
"We had a lovely stay at Lime Tree Bay! We even decided to book on an extra night as we loved it there, they have free use of paddle boards and kayaks and the location mid way down the keys is perfect."

Reviewed on Jan 24, 2025

Lime Tree Bay Resort
Hawks Cay Resort
Hawks Cay Resort
4 out of 5
61 Hawks Cay Blvd, Marathon, FL
The price is $429 per night from Feb 3 to Feb 4
$429
includes taxes & fees
Feb 3 - Feb 4
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! (1,002 reviews)
"Property had everything we needed and was centrally located for any day trips up and down the keys. Pool staff was awesome and the area didn’t feel crowded. A highlight was being able to swim with the dolphins."

Reviewed on Jan 22, 2025

Hawks Cay Resort
See all 2,210 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.