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Grassy Key

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Grassy Key Flights as Low as $103

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

Spirit Airlines
Sun, Jun 8 - Thu, Jun 12
EWR
Newark Liberty Intl. Airport
MIA
Miami Intl.
$103 Roundtrip, just found
$103
Roundtrip
just found
Select Spirit Airlines flight, departing Sun, Jun 8 from Newark Liberty Intl. Airport to Miami Intl., returning Thu, Jun 12, priced at $103 just found
Spirit Airlines
Mon, Jun 9 - Fri, Jun 13
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$103 Roundtrip, found 17 hours ago
$103
Roundtrip
found 17 hours ago
Select Spirit Airlines flight, departing Mon, Jun 9 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Fri, Jun 13, priced at $103 found 17 hours ago
Spirit Airlines
Mon, Jun 2 - Thu, Jun 12
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$108 Roundtrip, found 4 hours ago
$108
Roundtrip
found 4 hours ago
Select Spirit Airlines flight, departing Mon, Jun 2 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, Jun 12, priced at $108 found 4 hours ago
Spirit Airlines
Sun, Aug 31 - Thu, Sep 11
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$113 Roundtrip, found 17 hours ago
$113
Roundtrip
found 17 hours ago
Select Spirit Airlines flight, departing Sun, Aug 31 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, Sep 11, priced at $113 found 17 hours ago
Frontier Airlines
Mon, Jun 2 - Thu, Jun 12
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$115 Roundtrip, found 4 hours ago
$115
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Mon, Jun 2 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, Jun 12, priced at $115 found 4 hours ago
Spirit Airlines
Mon, Sep 8 - Fri, Sep 12
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$118 Roundtrip, found 4 hours ago
$118
Roundtrip
found 4 hours ago
Select Spirit Airlines flight, departing Mon, Sep 8 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Fri, Sep 12, priced at $118 found 4 hours ago
Frontier Airlines
Sun, Aug 31 - Thu, Sep 11
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$120 Roundtrip, found 17 hours ago
$120
Roundtrip
found 17 hours ago
Select Frontier Airlines flight, departing Sun, Aug 31 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, Sep 11, priced at $120 found 17 hours ago
Frontier Airlines
Thu, Aug 7 - Thu, Aug 7
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$123 Roundtrip, found 12 hours ago
$123
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Thu, Aug 7 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, Aug 7, priced at $123 found 12 hours ago
American Airlines
Wed, Jun 11 - Tue, Jun 17
JFK
John F. Kennedy Intl.
MIA
Miami Intl.
$127 Roundtrip, found 17 hours ago
$127
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Wed, Jun 11 from John F. Kennedy Intl. to Miami Intl., returning Tue, Jun 17, priced at $127 found 17 hours ago
Delta
Wed, Jun 11 - Tue, Jun 17
JFK
John F. Kennedy Intl.
MIA
Miami Intl.
$127 Roundtrip, found 17 hours ago
$127
Roundtrip
found 17 hours ago
Select Delta flight, departing Wed, Jun 11 from John F. Kennedy Intl. to Miami Intl., returning Tue, Jun 17, priced at $127 found 17 hours ago
United
Tue, Jul 15 - Tue, Jul 22
EWR
Newark Liberty Intl. Airport
MIA
Miami Intl.
$129 Roundtrip, found 10 hours ago
$129
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Jul 15 from Newark Liberty Intl. Airport to Miami Intl., returning Tue, Jul 22, priced at $129 found 10 hours ago
JetBlue Airways
Wed, Jun 11 - Tue, Jun 17
JFK
John F. Kennedy Intl.
MIA
Miami Intl.
$177 Roundtrip, found 17 hours ago
$177
Roundtrip
found 17 hours ago
Select JetBlue Airways flight, departing Wed, Jun 11 from John F. Kennedy Intl. to Miami Intl., returning Tue, Jun 17, priced at $177 found 17 hours ago
Spirit Airlines
Mon, Sep 22 - Thu, Sep 25
LAX
Los Angeles Intl.
MIA
Miami Intl.
$218 Roundtrip, found 18 hours ago
$218
Roundtrip
found 18 hours ago
Select Spirit Airlines flight, departing Mon, Sep 22 from Los Angeles Intl. to Miami Intl., returning Thu, Sep 25, priced at $218 found 18 hours ago
American Airlines
Mon, Oct 20 - Wed, Oct 29
EWR
Newark Liberty Intl. Airport
EYW
Key West Intl.
$249 Roundtrip, found 1 day ago
$249
Roundtrip
found 1 day ago
Select American Airlines flight, departing Mon, Oct 20 from Newark Liberty Intl. Airport to Key West Intl., returning Wed, Oct 29, priced at $249 found 1 day ago
American Airlines
Tue, Jun 24 - Tue, Jul 1
JFK
John F. Kennedy Intl.
EYW
Key West Intl.
$253 Roundtrip, found 1 day ago
$253
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Jun 24 from John F. Kennedy Intl. to Key West Intl., returning Tue, Jul 1, priced at $253 found 1 day ago
Delta
Thu, Jul 3 - Wed, Jul 9
ATL
Hartsfield-Jackson Atlanta Intl.
EYW
Key West Intl.
$339 Roundtrip, found 3 days ago
$339
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Jul 3 from Hartsfield-Jackson Atlanta Intl. to Key West Intl., returning Wed, Jul 9, priced at $339 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 June, 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 $103, 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 $103 right now, why wait?

Grassy Key Flight Information
Destination airport
Miami Intl.
Destination airport IATA code
MIA
Roundtrip price
$102

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 ...
8/10 Very Good! (643 reviews)
"We stayed here after spending 4 nights in Key Largo. The property is an older vacation resort in a great location. We enjoyed hanging outside with a fantastic water view better when the tide is up. The smell of the seagrass at times was a bit harsh, but when you have breezes it's not as bad. The ..."

Reviewed on May 21, 2025

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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! (464 reviews)
"The property is beautiful & tranquil. Just a really nice place!"

Reviewed on May 17, 2025

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Gulf View Waterfront Resort
Grassy Flats Resort & Beach Club
Grassy Flats Resort & Beach Club
2.5 out of 5
58182 Overseas Hwy, Marathon, FL
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! (278 reviews)
"Wonderful place to stay!!"

Reviewed on May 7, 2025

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Grassy Flats Resort & Beach Club
Hawks Cay Resort
Hawks Cay Resort
4 out of 5
61 Hawks Cay Blvd, Marathon, FL
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)
"Always a great time at this hotel!"

Reviewed on May 19, 2025

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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
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! (1,005 reviews)
"We love this resort. It’s our second time, probably won’t be the last"

Reviewed on May 22, 2025

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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
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! (1,069 reviews)
"The room was spacious and clean, and nicely decorated. We didn’t realize we booked off property , next time we will be sure to get a room on property"

Reviewed on May 22, 2025

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Lime Tree Bay Resort
Tranquility Bay Beachfront Hotel and Resort
Tranquility Bay Beachfront Hotel and Resort
4 out of 5
2600 Overseas Hwy, Marathon, FL
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)
"The family had a really great stay. The villa was clean and equipped with everything we needed. Kids enjoyed the pool and the beach area was nice for swimming and even some easy shallow snorkeling."

Reviewed on May 19, 2025

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Tranquility Bay Beachfront Hotel and Resort
Courtyard by Marriott Faro Blanco Resort
Courtyard by Marriott Faro Blanco Resort
3 out of 5
2146 Overseas Hwy, Marathon, FL
Stay at this 3-star beach hotel in Marathon. Enjoy free WiFi, 2 outdoor pools, and 2 bars/lounges. Our guests praise the pool and the helpful staff in our reviews. ...
9/10 Wonderful! (1,004 reviews)

Reviewed on May 22, 2025

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Courtyard by Marriott Faro Blanco Resort
See all 2,259 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.