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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.

Spirit Airlines
Wed, Apr 9 - Wed, Apr 23
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$58 Roundtrip, found 5 days ago
$58
Roundtrip
found 5 days ago
Select Spirit Airlines flight, departing Wed, Apr 9 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Wed, Apr 23, priced at $58 found 5 days ago
Spirit Airlines
Tue, Apr 22 - Wed, Apr 23
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$68 Roundtrip, found 23 hours ago
$68
Roundtrip
found 23 hours ago
Select Spirit Airlines flight, departing Tue, Apr 22 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Wed, Apr 23, priced at $68 found 23 hours ago
Spirit Airlines
Wed, Apr 9 - Wed, Apr 23
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$72 Roundtrip, found 5 days ago
$72
Roundtrip
found 5 days ago
Select Spirit Airlines flight, departing Wed, Apr 9 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Wed, Apr 23, priced at $72 found 5 days ago
Spirit Airlines
Tue, Apr 8 - Fri, Apr 11
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$73 Roundtrip, found 3 days ago
$73
Roundtrip
found 3 days ago
Select Spirit Airlines flight, departing Tue, Apr 8 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Fri, Apr 11, priced at $73 found 3 days ago
Spirit Airlines
Thu, May 8 - Mon, May 12
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$78 Roundtrip, found 12 hours ago
$78
Roundtrip
found 12 hours ago
Select Spirit Airlines flight, departing Thu, May 8 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Mon, May 12, priced at $78 found 12 hours ago
Spirit Airlines
Sat, Apr 19 - Wed, Apr 23
BWI
Baltimore Washington Intl. Thurgood Marshall
MIA
Miami Intl.
$81 Roundtrip, found 5 days ago
$81
Roundtrip
found 5 days ago
Select Spirit Airlines flight, departing Sat, Apr 19 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Wed, Apr 23, priced at $81 found 5 days ago
Spirit Airlines
Wed, Apr 9 - Wed, Apr 23
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$84 Roundtrip, found 5 days ago
$84
Roundtrip
found 5 days ago
Select Spirit Airlines flight, departing Wed, Apr 9 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Wed, Apr 23, priced at $84 found 5 days ago
Spirit Airlines
Wed, Apr 9 - Wed, Apr 23
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$86 Roundtrip, found 5 days ago
$86
Roundtrip
found 5 days ago
Select Spirit Airlines flight, departing Wed, Apr 9 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Wed, Apr 23, priced at $86 found 5 days ago
Frontier Airlines
Wed, Jun 25 - Tue, Jul 8
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$88 Roundtrip, found 1 day ago
$88
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Jun 25 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Tue, Jul 8, priced at $88 found 1 day ago
Spirit Airlines
Tue, Apr 1 - Wed, Apr 2
LGA
LaGuardia
MIA
Miami Intl.
$93 Roundtrip, found 2 days ago
$93
Roundtrip
found 2 days ago
Select Spirit Airlines flight, departing Tue, Apr 1 from LaGuardia to Miami Intl., returning Wed, Apr 2, priced at $93 found 2 days ago
Delta
Mon, May 12 - Wed, May 14
JFK
John F. Kennedy Intl.
MIA
Miami Intl.
$108 Roundtrip, found 4 days ago
$108
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, May 12 from John F. Kennedy Intl. to Miami Intl., returning Wed, May 14, priced at $108 found 4 days ago
JetBlue Airways
Wed, Apr 2 - Wed, Apr 9
JFK
John F. Kennedy Intl.
MIA
Miami Intl.
$119 Roundtrip, found 1 day ago
$119
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Wed, Apr 2 from John F. Kennedy Intl. to Miami Intl., returning Wed, Apr 9, priced at $119 found 1 day ago
Delta
Tue, Apr 1 - Wed, Apr 2
LGA
LaGuardia
MIA
Miami Intl.
$119 Roundtrip, found 2 days ago
$119
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Apr 1 from LaGuardia to Miami Intl., returning Wed, Apr 2, priced at $119 found 2 days ago
American Airlines
Tue, Apr 1 - Wed, Apr 2
LGA
LaGuardia
MIA
Miami Intl.
$119 Roundtrip, found 2 days ago
$119
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Apr 1 from LaGuardia to Miami Intl., returning Wed, Apr 2, priced at $119 found 2 days ago
United
Tue, Apr 22 - Tue, Apr 29
LGA
LaGuardia
MIA
Miami Intl.
$194 Roundtrip, found 2 days ago
$194
Roundtrip
found 2 days ago
Select United flight, departing Tue, Apr 22 from LaGuardia to Miami Intl., returning Tue, Apr 29, priced at $194 found 2 days ago
Delta
Fri, Apr 18 - Thu, Apr 24
ATL
Hartsfield-Jackson Atlanta Intl.
EYW
Key West Intl.
$259 Roundtrip, found 1 day ago
$259
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Apr 18 from Hartsfield-Jackson Atlanta Intl. to Key West Intl., returning Thu, Apr 24, priced at $259 found 1 day 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 April, 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 $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
$58

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 $303 per night from Mar 23 to Mar 24
$303
includes taxes & fees
Mar 23 - Mar 24
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! (593 reviews)
"Nice location. Breakfast was not the best. Ran out if food and only one man serving food. Sat for a very long time"

Reviewed on Mar 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 $314 per night from Mar 23 to Mar 24
$314
includes taxes & fees
Mar 23 - Mar 24
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! (430 reviews)
"Beautiful property!"

Reviewed on Mar 12, 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 $435 per night from Apr 20 to Apr 21
$435
includes taxes & fees
Apr 20 - Apr 21
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! (250 reviews)
"We loved Grassy Flats! Our room overlooked the pool and ocean - our view was breathtaking! The entire property was lush and felt like a resort. We popped over to the market both mornings for breakfast - delicious! Our servers were very friendly, making our experience very pleasant. The rooftop bar ..."

Reviewed on Mar 19, 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 $438 per night from Apr 1 to Apr 2
$438
includes taxes & fees
Apr 1 - Apr 2
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! (1,000 reviews)
"Staff was friendly, property was beautiful."

Reviewed on Mar 15, 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 $537 per night from Apr 6 to Apr 7
$537
includes taxes & fees
Apr 6 - Apr 7
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! (1,006 reviews)
Nice place
"Really well maintained property with friendly staff. Great place to stay with young kids. Wish they offered cribs."

Reviewed on Mar 18, 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 $303 per night from Mar 23 to Mar 24
$303
includes taxes & fees
Mar 23 - Mar 24
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! (1,040 reviews)
"What an amazing place to relax and reenergize your batteries with tremendous accommodations in a beautiful setting. The property has everything you need to enjoy your time away. The staff was very attentive to our needs and the special add ons such as bikes, paddle boards and kayaks, yoga made our ..."

Reviewed on Mar 16, 2025

Lime Tree Bay Resort
Banana Bay Resort & Marina
Banana Bay Resort & Marina
3 out of 5
4590 Overseas Highway, Marathon, FL
The price is $377 per night from Mar 27 to Mar 28
$377
includes taxes & fees
Mar 27 - Mar 28
Stay at this 3-star golf hotel in Marathon. Enjoy free breakfast, free parking, and a marina. Our guests praise the pool and the bar in our reviews. Popular ...
7.6/10 Good! (1,001 reviews)
"Very nice"

Reviewed on Mar 17, 2025

Banana Bay Resort & Marina
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 $283 per night from Apr 20 to Apr 21
$283
includes taxes & fees
Apr 20 - Apr 21
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! (1,350 reviews)
"Everything good! The rooms have a moldy smell in the closets"

Reviewed on Mar 16, 2025

Faro Blanco Resort & Yacht Club Marathon, Curio by Hilton
See all 2,209 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.