Cheap flights from Seattle to Grassy Key

View AU$211 flight on Sun, 24 Aug. 2025Opens in a new window

Popular airlines from Seattle to Grassy Key

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Cheap Flights from Seattle (SEA) to Grassy Key (MIA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sun, 17 Aug. - Tue, 26 Aug.
SEA
Seattle
MIA
Miami
AU$361 Return, found 11 hours ago
AU$361
Return
found 11 hours ago
Select Alaska Airlines flight, departing Sun, 17 Aug. from Seattle to Miami, returning Tue, 26 Aug., priced at AU$361 found 11 hours ago
American Airlines
Tue, 19 Aug. - Tue, 26 Aug.
SEA
Seattle
MIA
Miami
AU$362 Return, found 2 days ago
AU$362
Return
found 2 days ago
Select American Airlines flight, departing Tue, 19 Aug. from Seattle to Miami, returning Tue, 26 Aug., priced at AU$362 found 2 days ago
Delta
Tue, 5 Aug. - Tue, 12 Aug.
SEA
Seattle
MIA
Miami
AU$362 Return, found 1 day ago
AU$362
Return
found 1 day ago
Select Delta flight, departing Tue, 5 Aug. from Seattle to Miami, returning Tue, 12 Aug., priced at AU$362 found 1 day ago
Hawaiian Airlines
Sun, 14 Sep. - Tue, 23 Sep.
SEA
Seattle
MIA
Miami
AU$391 Return, found 2 days ago
AU$391
Return
found 2 days ago
Select Hawaiian Airlines flight, departing Sun, 14 Sep. from Seattle to Miami, returning Tue, 23 Sep., priced at AU$391 found 2 days ago
Alaska Airlines
Sat, 26 Jul. - Tue, 12 Aug.
SEA
Seattle
MIA
Miami
AU$391 Return, found 2 days ago
AU$391
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 26 Jul. from Seattle to Miami, returning Tue, 12 Aug., priced at AU$391 found 2 days ago
United
Mon, 27 Oct. - Fri, 31 Oct.
SEA
Seattle
MIA
Miami
AU$544 Return, found 1 day ago
AU$544
Return
found 1 day ago
Select United flight, departing Mon, 27 Oct. from Seattle to Miami, returning Fri, 31 Oct., priced at AU$544 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to Miami (MIA)

January is typically the cheapest month to fly

From AU$234 - AU$542 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.