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Grassy Key

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Grassy Key Flights as Low as $102

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

Frontier Airlines
Tue, Sep 1 - Sat, Sep 19
DFW
Dallas-Fort Worth Intl.
MIA
Miami Intl.
$102 Roundtrip, found 1 day ago
$102
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Sep 1 from Dallas-Fort Worth Intl. to Miami Intl., returning Sat, Sep 19, priced at $102 found 1 day ago
Frontier Airlines
Tue, Sep 1 - Sat, Sep 19
DFW
Dallas-Fort Worth Intl.
MIA
Miami Intl.
$112 Roundtrip, found 1 day ago
$112
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Sep 1 from Dallas-Fort Worth Intl. to Miami Intl., returning Sat, Sep 19, priced at $112 found 1 day ago
Frontier Airlines
Wed, Aug 12 - Mon, Aug 24
DFW
Dallas-Fort Worth Intl.
MIA
Miami Intl.
$115 Roundtrip, found 2 days ago
$115
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Aug 12 from Dallas-Fort Worth Intl. to Miami Intl., returning Mon, Aug 24, priced at $115 found 2 days ago
American Airlines
Mon, Nov 9 - Tue, Nov 17
EWR
Newark Liberty Intl. Airport
MIA
Miami Intl.
$197 Roundtrip, found 4 days ago
$197
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Nov 9 from Newark Liberty Intl. Airport to Miami Intl., returning Tue, Nov 17, priced at $197 found 4 days ago
United
Fri, Jan 22 - Thu, Jan 28
EWR
Newark Liberty Intl. Airport
MIA
Miami Intl.
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago
Select United flight, departing Fri, Jan 22 from Newark Liberty Intl. Airport to Miami Intl., returning Thu, Jan 28, priced at $197 found 2 days ago
Delta
Tue, Oct 13 - Fri, Oct 23
EWR
Newark Liberty Intl. Airport
MIA
Miami Intl.
$217 Roundtrip, found 2 days ago
$217
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Oct 13 from Newark Liberty Intl. Airport to Miami Intl., returning Fri, Oct 23, priced at $217 found 2 days ago
American Airlines
Tue, Sep 1 - Tue, Sep 15
EWR
Newark Liberty Intl. Airport
EYW
Key West Intl.
$309 Roundtrip, found 4 hours ago
$309
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Tue, Sep 1 from Newark Liberty Intl. Airport to Key West Intl., returning Tue, Sep 15, priced at $309 found 4 hours ago
Delta
Sun, Aug 2 - Wed, Aug 12
MLI
Quad City Intl.
EYW
Key West Intl.
$329 Roundtrip, found 1 day ago
$329
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Aug 2 from Quad City Intl. to Key West Intl., returning Wed, Aug 12, priced at $329 found 1 day ago
Delta
Fri, Jul 17 - Sat, Jul 25
DAL
Love Field
MIA
Miami Intl.
$357 Roundtrip, found 15 hours ago
$357
Roundtrip
found 15 hours ago
Select Delta flight, departing Fri, Jul 17 from Love Field to Miami Intl., returning Sat, Jul 25, priced at $357 found 15 hours ago
JetBlue Airways
Tue, Oct 20 - Mon, Nov 2
EWR
Newark Liberty Intl. Airport
EKW
Miami Central Brightline Train Station
$366 Roundtrip, found 6 days ago
$366
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Tue, Oct 20 from Newark Liberty Intl. Airport to Miami Central Brightline Train Station, returning Mon, Nov 2, priced at $366 found 6 days ago
JetBlue Airways
Mon, Aug 10 - Wed, Aug 19
DFW
Dallas-Fort Worth Intl.
EKW
Miami Central Brightline Train Station
$367 Roundtrip, found 2 days ago
$367
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Aug 10 from Dallas-Fort Worth Intl. to Miami Central Brightline Train Station, returning Wed, Aug 19, priced at $367 found 2 days ago
JetBlue Airways
Mon, Nov 9 - Tue, Nov 17
EWR
Newark Liberty Intl. Airport
AVT
Aventura Brightline Train Station
$388 Roundtrip, found 4 days ago
$388
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Mon, Nov 9 from Newark Liberty Intl. Airport to Aventura Brightline Train Station, returning Tue, Nov 17, priced at $388 found 4 days ago
JetBlue Airways
Wed, Aug 12 - Thu, Aug 13
DFW
Dallas-Fort Worth Intl.
AVT
Aventura Brightline Train Station
$388 Roundtrip, found 1 day ago
$388
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Wed, Aug 12 from Dallas-Fort Worth Intl. to Aventura Brightline Train Station, returning Thu, Aug 13, priced at $388 found 1 day ago
American Airlines
Tue, Sep 15 - Tue, Sep 29
DFW
Dallas-Fort Worth Intl.
EYW
Key West Intl.
$457 Roundtrip, found 1 day ago
$457
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Sep 15 from Dallas-Fort Worth Intl. to Key West Intl., returning Tue, Sep 29, priced at $457 found 1 day ago
Delta
Tue, Sep 15 - Tue, Sep 29
DAL
Love Field
EYW
Key West Intl.
$611 Roundtrip, found 1 day ago
$611
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Sep 15 from Love Field to Key West Intl., returning Tue, Sep 29, priced at $611 found 1 day ago
Alaska Airlines
Sun, May 31 - Tue, Jun 2
DFW
Dallas-Fort Worth Intl.
MIA
Miami Intl.
$794 Roundtrip, found 3 days ago
$794
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sun, May 31 from Dallas-Fort Worth Intl. to Miami Intl., returning Tue, Jun 2, priced at $794 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 September, 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 $102, 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 $102 right now, why wait?

Grassy Key Flight Information
Destination airport
Miami Intl.
Destination airport IATA code
MIA
Roundtrip price
$197

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 ...
8.2/10 Very Good! (958 reviews)
Everything was amazing

Reviewed on May 15, 2026

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Rainbow Bend Resort
Grassy Flats Resort & Beach Club

Grassy Flats Resort & Beach Club

4 out of 5
58182 Overseas Hwy Marathon FL
Stay at this hotel in Marathon. Enjoy free WiFi, free parking, and 2 outdoor pools. Our guests praise the helpful staff and the property condition in our reviews. ...
9.4/10 Exceptional! (442 reviews)
The room was outstanding. The view was absolutely gorgeous. We were on the same floor as the entertainment/bar, but the noise was minimal and stopped at a reasonable hour. Parking was convenient too. The staff on the front desk were always kind. The house cat, Wilma, is awesome. If there was any ...

Reviewed on May 7, 2026

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Grassy Flats Resort & Beach Club
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! (571 reviews)
Me gusto mucho! Pasamos sólo una noche pero todo estaba súper limpio y muy acogedor!

Reviewed on May 10, 2026

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Gulf View Waterfront Resort
Hawks Cay Resort

Hawks Cay Resort

4 out of 5
61 Hawks Cay Blvd Marathon FL
Book a stay at this luxury hotel in Marathon. Enjoy free WiFi, 3 outdoor pools, and a full-service spa. Our guests praise the pool and the helpful staff in our ...
8.2/10 Very Good! (1,004 reviews)
Our reservation was changed from a suite at the resort to a villa away from the resort amenities. The villa was sparsely stocked kitchen, very steep stairs and a queen bed verses the king we reserved.

Reviewed on May 16, 2026

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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 Marathon FL
Book a stay at this 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 ...
9.2/10 Wonderful! (1,149 reviews)
The property is beautiful & the service top notch. Food was very good. High quality & food presentation superb! We would certainly stay there again

Reviewed on May 17, 2026

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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
Book a stay at this 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! (1,289 reviews)
Location is great the only issue was a very small beach area.

Reviewed on May 16, 2026

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Lime Tree Bay Resort
Fairfield Inn & Suites by Marriott Marathon Florida Keys

Fairfield Inn & Suites by Marriott Marathon Florida Keys

3 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 ...
9.2/10 Wonderful! (1,132 reviews)
Staff was excellent and the facility was clean. However we were surprised to learn of an additional $20 per day to park our vehicle in their lot. You don’t get a parking spot included with your room fee.

Reviewed on May 15, 2026

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Fairfield Inn & Suites by Marriott Marathon Florida Keys
Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys

Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys

3 out of 5
2146 Overseas Hwy Marathon FL
Book a stay at this beach hotel in Marathon. Enjoy free WiFi, 2 outdoor pools, and a beach locale. Our guests praise the pool and the helpful staff in our reviews. ...
9/10 Wonderful! (1,002 reviews)
The air conditioning was awful!! LOUD. the vent was next to the bed so every time it cut in it woke us up. Also there was something in the vent that was rattling. Worst sleep ever.

Reviewed on May 14, 2026

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Courtyard by Marriott Faro Blanco Resort, Marathon Florida Keys
See all 2,338 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.