Cheap flights from Boston to Fleming Key

View AU$91 flight on Tue, 16 Sep. 2025Opens in a new window

Popular airlines from Boston to Fleming Key

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Boston (BOS) to Fleming 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.

Delta
Wed, 24 Sep. - Sat, 27 Sep.
BOS
Boston
MIA
Miami
AU$182 Return, found 3 days ago
AU$182
Return
found 3 days ago
Select Delta flight, departing Wed, 24 Sep. from Boston to Miami, returning Sat, 27 Sep., priced at AU$182 found 3 days ago
Delta
Wed, 24 Sep. - Sat, 27 Sep.
BOS
Boston
MIA
Miami
AU$198 Return, found 3 days ago
AU$198
Return
found 3 days ago
Select Delta flight, departing Wed, 24 Sep. from Boston to Miami, returning Sat, 27 Sep., priced at AU$198 found 3 days ago
Delta
Mon, 8 Sep. - Sat, 13 Sep.
BOS
Boston
MIA
Miami
AU$214 Return, found 5 hours ago
AU$214
Return
found 5 hours ago
Select Delta flight, departing Mon, 8 Sep. from Boston to Miami, returning Sat, 13 Sep., priced at AU$214 found 5 hours ago
American Airlines
Wed, 24 Sep. - Sat, 27 Sep.
BOS
Boston
MIA
Miami
AU$230 Return, found 3 days ago
AU$230
Return
found 3 days ago
Select American Airlines flight, departing Wed, 24 Sep. from Boston to Miami, returning Sat, 27 Sep., priced at AU$230 found 3 days ago
United
Wed, 24 Sep. - Sat, 27 Sep.
BOS
Boston
MIA
Miami
AU$300 Return, found 3 days ago
AU$300
Return
found 3 days ago
Select United flight, departing Wed, 24 Sep. from Boston to Miami, returning Sat, 27 Sep., priced at AU$300 found 3 days ago
Alaska Airlines
Fri, 26 Dec. - Sun, 4 Jan.
BOS
Boston
MIA
Miami
AU$11,271 Return, found 4 days ago
AU$11,271
Return
found 4 days ago
Select Alaska Airlines flight, departing Fri, 26 Dec. from Boston to Miami, returning Sun, 4 Jan., priced at AU$11,271 found 4 days ago

Find the cheapest month to fly from Boston (BOS) to Miami (MIA)

March is typically the cheapest month to fly

From AU$87 - AU$516 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.