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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
Tue, Jul 8 - Tue, Jul 22
EWR
Newark Liberty Intl. Airport
MIA
Miami Intl.
$103 Roundtrip, found 2 hours ago
$103
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Tue, Jul 8 from Newark Liberty Intl. Airport to Miami Intl., returning Tue, Jul 22, priced at $103 found 2 hours ago
Spirit Airlines
Sun, Jun 29 - Fri, Jul 4
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$103 Roundtrip, found 13 hours ago
$103
Roundtrip
found 13 hours ago
Select Spirit Airlines flight, departing Sun, Jun 29 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Fri, Jul 4, priced at $103 found 13 hours ago
Frontier Airlines
Sun, Jun 29 - Fri, Jul 4
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$105 Roundtrip, found 13 hours ago
$105
Roundtrip
found 13 hours ago
Select Frontier Airlines flight, departing Sun, Jun 29 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Fri, Jul 4, priced at $105 found 13 hours ago
United
Fri, Aug 22 - Sat, Aug 30
IAH
George Bush Intercontinental
MIA
Miami Intl.
$107 Roundtrip, found 1 hour ago
$107
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Aug 22 from George Bush Intercontinental to Miami Intl., returning Sat, Aug 30, priced at $107 found 1 hour ago
American Airlines
Fri, Aug 22 - Sat, Aug 30
IAH
George Bush Intercontinental
MIA
Miami Intl.
$107 Roundtrip, found 1 hour ago
$107
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Fri, Aug 22 from George Bush Intercontinental to Miami Intl., returning Sat, Aug 30, priced at $107 found 1 hour ago
Spirit Airlines
Thu, Sep 25 - Thu, Oct 2
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$108 Roundtrip, found 17 hours ago
$108
Roundtrip
found 17 hours ago
Select Spirit Airlines flight, departing Thu, Sep 25 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Thu, Oct 2, priced at $108 found 17 hours ago
Spirit Airlines
Sat, Jul 5 - Tue, Jul 8
IAH
George Bush Intercontinental
MIA
Miami Intl.
$112 Roundtrip, found 15 hours ago
$112
Roundtrip
found 15 hours ago
Select Spirit Airlines flight, departing Sat, Jul 5 from George Bush Intercontinental to Miami Intl., returning Tue, Jul 8, priced at $112 found 15 hours ago
Spirit Airlines
Wed, Jul 16 - Wed, Jul 16
IAH
George Bush Intercontinental
MIA
Miami Intl.
$115 Roundtrip, found 11 hours ago
$115
Roundtrip
found 11 hours ago
Select Spirit Airlines flight, departing Wed, Jul 16 from George Bush Intercontinental to Miami Intl., returning Wed, Jul 16, priced at $115 found 11 hours ago
Spirit Airlines
Tue, Aug 26 - Wed, Sep 3
DFW
Dallas-Fort Worth Intl.
MIA
Miami Intl.
$116 Roundtrip, found 17 hours ago
$116
Roundtrip
found 17 hours ago
Select Spirit Airlines flight, departing Tue, Aug 26 from Dallas-Fort Worth Intl. to Miami Intl., returning Wed, Sep 3, priced at $116 found 17 hours ago
Frontier Airlines
Wed, Jul 2 - Wed, Jul 2
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$125 Roundtrip, found 1 day ago
$125
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Jul 2 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Wed, Jul 2, priced at $125 found 1 day ago
Delta
Wed, Sep 3 - Tue, Sep 9
ATL
Hartsfield-Jackson Atlanta Intl.
MIA
Miami Intl.
$139 Roundtrip, found 2 hours ago
$139
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Sep 3 from Hartsfield-Jackson Atlanta Intl. to Miami Intl., returning Tue, Sep 9, priced at $139 found 2 hours ago
Delta
Tue, Aug 26 - Wed, Sep 3
DAL
Love Field
MIA
Miami Intl.
$221 Roundtrip, found 17 hours ago
$221
Roundtrip
found 17 hours ago
Select Delta flight, departing Tue, Aug 26 from Love Field to Miami Intl., returning Wed, Sep 3, priced at $221 found 17 hours ago
United
Tue, Aug 5 - Tue, Aug 12
EWR
Newark Liberty Intl. Airport
EYW
Key West Intl.
$234 Roundtrip, found 15 hours ago
$234
Roundtrip
found 15 hours ago
Select United flight, departing Tue, Aug 5 from Newark Liberty Intl. Airport to Key West Intl., returning Tue, Aug 12, priced at $234 found 15 hours ago
American Airlines
Fri, Jul 4 - Fri, Jul 4
ATL
Hartsfield-Jackson Atlanta Intl.
EYW
Key West Intl.
$421 Roundtrip, found 3 days ago
$421
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Jul 4 from Hartsfield-Jackson Atlanta Intl. to Key West Intl., returning Fri, Jul 4, priced at $421 found 3 days ago
Delta
Tue, Aug 12 - Thu, Aug 21
DAL
Love Field
EYW
Key West Intl.
$455 Roundtrip, found 5 days ago
$455
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Aug 12 from Love Field to Key West Intl., returning Thu, Aug 21, priced at $455 found 5 days ago
Delta
Tue, Aug 12 - Thu, Aug 21
DFW
Dallas-Fort Worth Intl.
EYW
Key West Intl.
$455 Roundtrip, found 5 days ago
$455
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Aug 12 from Dallas-Fort Worth Intl. to Key West Intl., returning Thu, Aug 21, priced at $455 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 July, 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! (656 reviews)
"We had a nice quiet stay,the room we had right at ocean front. Nice big comfy bed.Cold Air to get out of the heat.The people the run the resort were friendly and great.I highly recommend it."

Reviewed on May 27, 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! (473 reviews)
"We enjoyed our stay. Room clean. No room service. A little old property, but nice. No beach, in walking distance. Like beach with sand"

Reviewed on May 26, 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! (284 reviews)
"Absolutely beautiful!! Room was great, views where amazing. Definitely plan on staying here again!"

Reviewed on Jun 8, 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 ...
8/10 Very Good! (1,005 reviews)
"Great"

Reviewed on Jun 14, 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! (1,004 reviews)
"Great views. Beautiful property."

Reviewed on Jun 14, 2025

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Isla Bella Beach Resort & Spa
Fairfield Inn & Suites by Marriott Marathon Florida Keys
Fairfield Inn & Suites by Marriott Marathon Florida Keys
2.5 out of 5
13201 Overseas Hwy, Marathon, FL
Book a stay at this business-friendly hotel in Marathon. Enjoy free breakfast, free WiFi, and 2 outdoor pools. Our guests praise the breakfast and the restaurant ...
9/10 Wonderful! (1,010 reviews)
"Great location with restaurants around it offering a variety of cuisines. Great one attached to the hotel which is located in a small marina. Pet friendly hotel and Sharkys bar next door is too so great place for our fur babies to hang out too!"

Reviewed on Jun 14, 2025

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Fairfield Inn & Suites by Marriott Marathon Florida Keys
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! (1,074 reviews)
"Cute place we would stay here again!"

Reviewed on Jun 11, 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! (1,004 reviews)
"The hotel was gorgeous. The only complaint was that the villa had a lot of ants, so we had to be extra careful about leaving food out."

Reviewed on Jun 13, 2025

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Tranquility Bay Beachfront Hotel and Resort
See all 2,241 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.