Flights from Washington to Key Largo

Cheapest flights from Washington

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, May 24 - Sun, May 25

IAD

Washington Dulles Intl.

MIA

Miami Intl.

$104 Roundtrip, found 4 days ago

$104

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sat, May 24 from Washington Dulles Intl. to Miami Intl., returning Sun, May 25, priced at $104 found 4 days ago

Mon, May 26 - Wed, May 28

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$108 Roundtrip, found 5 hours ago

$108

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Mon, May 26 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Wed, May 28, priced at $108 found 5 hours ago

Thu, Jun 12 - Thu, Jun 19

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$108 Roundtrip, found 8 hours ago

$108

Roundtrip

found 8 hours ago

Select Spirit Airlines flight, departing Thu, Jun 12 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Thu, Jun 19, priced at $108 found 8 hours ago

Sun, Jun 15 - Wed, Jun 18

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$111 Roundtrip, found 8 hours ago

$111

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Sun, Jun 15 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Wed, Jun 18, priced at $111 found 8 hours ago

Sun, Jun 15 - Sat, Jun 21

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$114 Roundtrip, found 8 hours ago

$114

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Sun, Jun 15 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Sat, Jun 21, priced at $114 found 8 hours ago

Mon, Jun 16 - Sat, Jun 21

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$117 Roundtrip, found 8 hours ago

$117

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Mon, Jun 16 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Sat, Jun 21, priced at $117 found 8 hours ago

Mon, May 26 - Sat, May 31

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$118 Roundtrip, found 5 hours ago

$118

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Mon, May 26 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Sat, May 31, priced at $118 found 5 hours ago

Thu, Jun 12 - Wed, Jun 18

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$121 Roundtrip, found 8 hours ago

$121

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Thu, Jun 12 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Wed, Jun 18, priced at $121 found 8 hours ago

Thu, Jun 12 - Sat, Jun 21

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$124 Roundtrip, found 8 hours ago

$124

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Thu, Jun 12 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Sat, Jun 21, priced at $124 found 8 hours ago

Fri, Jun 13 - Tue, Jun 17

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$126 Roundtrip, found 8 hours ago

$126

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Fri, Jun 13 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Tue, Jun 17, priced at $126 found 8 hours ago

Fri, Jun 13 - Wed, Jun 18

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$129 Roundtrip, found 8 hours ago

$129

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Fri, Jun 13 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Wed, Jun 18, priced at $129 found 8 hours ago

Sun, Jun 15 - Fri, Jun 20

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$131 Roundtrip, found 8 hours ago

$131

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Sun, Jun 15 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Fri, Jun 20, priced at $131 found 8 hours ago

Fri, Jun 13 - Sat, Jun 21

BWI

Baltimore Washington Intl. Thurgood Marshall

MIA

Miami Intl.

$132 Roundtrip, found 8 hours ago

$132

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Fri, Jun 13 from Baltimore Washington Intl. Thurgood Marshall to Miami Intl., returning Sat, Jun 21, priced at $132 found 8 hours ago

Mon, Jun 2 - Fri, Jun 6

DCA

Ronald Reagan Washington National

MIA

Miami Intl.

$137 Roundtrip, found 11 hours ago

$137

Roundtrip

found 11 hours ago

Select Delta flight, departing Mon, Jun 2 from Ronald Reagan Washington National to Miami Intl., returning Fri, Jun 6, priced at $137 found 11 hours ago

Sat, Apr 4 - Wed, Apr 8

DCA

Ronald Reagan Washington National

MIA

Miami Intl.

$181 Roundtrip, found 3 days ago

$181

Roundtrip

found 3 days ago

Select American Airlines flight, departing Sat, Apr 4 from Ronald Reagan Washington National to Miami Intl., returning Wed, Apr 8, priced at $181 found 3 days ago

Thu, Jun 5 - Mon, Jun 9

DCA

Ronald Reagan Washington National

MIA

Miami Intl.

$230 Roundtrip, found 11 hours ago

$230

Roundtrip

found 11 hours ago

Select United flight, departing Thu, Jun 5 from Ronald Reagan Washington National to Miami Intl., returning Mon, Jun 9, priced at $230 found 11 hours ago

Wed, May 28 - Wed, Jun 4

BWI

Baltimore Washington Intl. Thurgood Marshall

EYW

Key West Intl.

$271 Roundtrip, found 4 days ago

$271

Roundtrip

found 4 days ago

Select Delta flight, departing Wed, May 28 from Baltimore Washington Intl. Thurgood Marshall to Key West Intl., returning Wed, Jun 4, priced at $271 found 4 days ago

Sat, Apr 4 - Wed, Apr 8

DCA

Ronald Reagan Washington National

MIA

Miami Intl.

$479 Roundtrip, found 3 days ago

$479

Roundtrip

found 3 days ago

Select JetBlue Airways flight, departing Sat, Apr 4 from Ronald Reagan Washington National to Miami Intl., returning Wed, Apr 8, priced at $479 found 3 days ago

Fri, Jan 16 - Tue, Jan 20

DCA

Ronald Reagan Washington National

EYW

Key West Intl.

$524 Roundtrip, found 1 day ago

$524

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Jan 16 from Ronald Reagan Washington National to Key West Intl., returning Tue, Jan 20, priced at $524 found 1 day ago

Fri, Jan 16 - Tue, Jan 20

IAD

Washington Dulles Intl.

EYW

Key West Intl.

$639 Roundtrip, found 1 day ago

$639

Roundtrip

found 1 day ago

Select United flight, departing Fri, Jan 16 from Washington Dulles Intl. to Key West Intl., returning Tue, Jan 20, priced at $639 found 1 day ago