$91 Cheap Frontier Airlines flights Boston (BOS) to Washington (IAD)

View $91 flight on Mon, Jan 26, 2026Opens in a new window

$91 Cheap Frontier Airlines flights Boston (BOS) to Washington (IAD)

Prices were available within the past 7 days and start at $91 for one-way flights and $170 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Jan 26 - Thu, Jan 29
BOS
Boston
IAD
Washington
$170 Roundtrip, found 2 days ago
$170
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, Jan 26 from Boston to Washington, returning Thu, Jan 29, priced at $170 found 2 days ago

Find the cheapest month to fly from Boston (BOS) to Washington (IAD)

February is typically the cheapest month to fly

From $97 - $234 per traveler.

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $133
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $133
Flights from Boston (BOS) to Washington (IAD)
Origin airport
Logan Intl.
Destination airport
Washington Dulles Intl.
Distance
657 km
Average flight time
1 hour 46 mins