Earn point on your loyalty program!arrow arc left

Cheap flights from Portland (PDX) to Washington (DCA)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Portland (PDX) to Washington (DCA)

How to find the cheapest flight from Portland (PDX) to Washington (DCA)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Portland (PDX) to Washington (DCA)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Portland (PDX) to Washington (DCA)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Portland to Washington in September , October 2026

30 Sep - 31 Oct $ 902.00
PDX
Portland
Alaska Airlines
DIRECT
DCA
Washington
DCA
Washington
Alaska Airlines
DIRECT
PDX
Portland
Pick dates
30 Sep - 04 Oct $ 934.00
PDX
Portland
Frontier Airlines
DIRECT
DCA
Washington
DCA
Washington
Frontier Airlines
1 STOPS
PDX
Portland
Pick dates
30 Sep - 02 Oct $ 1,239.00
PDX
Portland
Alaska Airlines
DIRECT
DCA
Washington
DCA
Washington
Alaska Airlines
DIRECT
PDX
Portland
Pick dates

Last minute flights from Portland to Washington

29 Sep - 01 Oct $ 961.00
PDX
Portland
Frontier Airlines
1 STOPS
DCA
Washington
DCA
Washington
Frontier Airlines
1 STOPS
PDX
Portland
Pick dates
29 Sep - 30 Sep $ 1,222.00
PDX
Portland
United Airlines
1 STOPS
DCA
Washington
DCA
Washington
United Airlines
1 STOPS
PDX
Portland
Pick dates
29 Sep - 30 Sep $ 1,263.00
PDX
Portland
Alaska Airlines
1 STOPS
DCA
Washington
DCA
Washington
Alaska Airlines
DIRECT
PDX
Portland
Pick dates

One-way flights to Washington from Portland

11:30 PM - 10:00 AM
United Airlines
1 Stops
10h 38m
PDX - DCA
$ 579
Kiwi
Pick dates
7:52 AM - 7:52 AM
Alaska Airlines
0 Stops
5h 8m
PDX - DCA
$ 613
Kiwi
Pick dates
5:00 AM - 9:35 AM
United Airlines
1 Stops
7h 4m
PDX - DCA
$ 621
Kiwi
Pick dates

How to find the cheapest flight from Portland (PDX) to Washington (DCA)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Portland (PDX) to Washington (DCA)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Portland (PDX) to Washington (DCA)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.