Cheap Flights to Washington County from $28

View $28 flight on Mon, Mar 16, 2026Opens in a new window

Popular airlines to Washington County

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

  • American Airlines

    American Airlines

  • Southwest Airlines

    Southwest Airlines

  • Frontier Airlines

    Frontier Airlines

  • Air Canada

    Air Canada

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

How much is the cheapest flight to Washington County?

Prices were available within the past 7 days and start at $28 for one-way flights and $56 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Mar 12 - Sun, Mar 15
DEN
Denver
PDX
Portland
$56 Roundtrip, just found
$56
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Mar 12 from Denver to Portland, returning Sun, Mar 15, priced at $56 just found
Frontier Airlines
Sat, Mar 7 - Sat, Mar 14
LAX
Los Angeles
PDX
Portland
$56 Roundtrip, found 7 hours ago
$56
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Sat, Mar 7 from Los Angeles to Portland, returning Sat, Mar 14, priced at $56 found 7 hours ago
Frontier Airlines
Sun, Mar 15 - Fri, Apr 3
DEN
Denver
PDX
Portland
$57 Roundtrip, found 1 day ago
$57
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Mar 15 from Denver to Portland, returning Fri, Apr 3, priced at $57 found 1 day ago
Frontier Airlines
Sat, Mar 14 - Sat, Mar 28
LAX
Los Angeles
PDX
Portland
$62 Roundtrip, found 9 hours ago
$62
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Sat, Mar 14 from Los Angeles to Portland, returning Sat, Mar 28, priced at $62 found 9 hours ago
Frontier Airlines
Sat, Mar 7 - Sun, Mar 8
LAX
Los Angeles
PDX
Portland
$66 Roundtrip, just found
$66
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Mar 7 from Los Angeles to Portland, returning Sun, Mar 8, priced at $66 just found
Frontier Airlines
Sat, Mar 21 - Sun, Mar 29
PHX
Phoenix
PDX
Portland
$72 Roundtrip, just found
$72
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Mar 21 from Phoenix to Portland, returning Sun, Mar 29, priced at $72 just found
Hawaiian Airlines
Sat, Apr 4 - Tue, Apr 14
ONT
Ontario
PDX
Portland
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Hawaiian Airlines flight, departing Sat, Apr 4 from Ontario to Portland, returning Tue, Apr 14, priced at $137 just found
Southwest Airlines
Sat, Feb 21 - Tue, Feb 24
DEN
Denver
PDX
Portland
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Feb 21 from Denver to Portland, returning Tue, Feb 24, priced at $137 just found
United
Sat, Feb 21 - Tue, Feb 24
DEN
Denver
PDX
Portland
$137 Roundtrip, just found
$137
Roundtrip
just found
Select United flight, departing Sat, Feb 21 from Denver to Portland, returning Tue, Feb 24, priced at $137 just found
American Airlines
Wed, Feb 25 - Wed, Mar 4
LAX
Los Angeles
PDX
Portland
$139 Roundtrip, found 6 hours ago
$139
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Wed, Feb 25 from Los Angeles to Portland, returning Wed, Mar 4, priced at $139 found 6 hours ago

Airports in Washington County

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

Select flight to Portland Intl. PDX. Cheapest option available. Flights from $447
PDX
Portland Intl.
Cheapest
Flights from $447

Trending flights to Washington County

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.

Frontier Airlines
Thu, Mar 12 - Sun, Mar 15
DEN
Denver
PDX
Portland
$56 Roundtrip, just found
$56
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Mar 12 from Denver to Portland, returning Sun, Mar 15, priced at $56 just found

Frequently asked questions

How do I find cheap flights to Washington County that have flexible change policies?
When it comes to traveling these days, flexibility is a must. That's why we've added a "No change fee" search function to help you locate flexible, low-priced fares to Washington County. It's at the top left of your screen just below the "Flexible change policies" subheading.
Which airlines fly to Washington County?
With a good range of airlines offering flights into or near Washington County, the choice is yours:

  • Alaska Airlines - 2,614 flights to or near Washington County each month, including 2,614 flights to Portland Intl. Airport (PDX) per month.
  • Delta Air Lines - 814 flights to or near Washington County each month, including 814 flights to Portland Intl. Airport (PDX) per month.
  • Southwest Airlines - 784 flights to or near Washington County each month, including 784 flights to Portland Intl. Airport (PDX) per month.

How can I find cheap tickets to Washington County?
An excellent strategy for scoring cheap tickets is to be flexible with your travel dates. Begin with searching for your flight to Washington County, then click on the "flexible dates" link to see prices for nearby days. Another helpful hint? Book well ahead of time. For an idea of costs, $56 was the best price for a flight to Washington County in the last seven days.
How much is a flight to Washington County?
You could have nabbed a return air ticket to Washington County from anywhere between $56 and $139 in the last seven days. For one-way journeys leaving from Denver (DEN), the lowest amount paid during this period was just $28.
What are the most popular airports to fly into in Washington County?
Jet into Portland Intl. Airport (PDX) and sample the best that Washington County has to offer. As the region's main entry point, around 5,648 flights land here every month.
When is the cheapest time to fly to Washington County?
Leave for Washington County early in the week and you'll usually be rewarded with lower fares. Tuesday is generally the cheapest day to jet off, closely followed by Monday. If you're eager to avoid the priciest flights, steer clear of Saturdays.
How much is a plane ticket to Washington County?
In the last seven days, tickets to Washington County varied between $56 and $139. Prices generally depend on the time of departure, airline, cabin class and how early the fare is booked.
What months are the cheapest to book a flight to Washington County?
To snap up a bargain flight to Washington County, try to book during February when ticket prices are at their cheapest. When do tickets cost the most? In the U.S, it's the month of December.
How long is a flight to Washington County?
It could take you an hour or two or longer — it really depends on which part of the States you're flying from. The average flight times for these in-demand domestic routes to Washington County will give you a clearer idea of what you can expect:

  • Seattle, WA (SEA-Seattle - Tacoma Intl.) to Portland Intl. Airport (PDX) - 1 hour
  • Los Angeles, CA (LAX-Los Angeles Intl.) to Portland Intl. Airport (PDX) - 2 hours and 24 minutes
  • San Francisco, CA (SFO-San Francisco Intl.) to Portland Intl. Airport (PDX) - 1 hour and 46 minutes

What is the best time to go to Washington County?
Hillsboro, Washington County's most populous city, is a terrific destination to explore at anytime. Don't like the cold? Then venture here from June 20 onward in summer, when average temperatures range from 55ºF to 80ºF. March, May and June is when Hillsboro draws the biggest crowds.

Book with confidence

Enjoy extra legroom, flight flexibility, and a seamless travel experience.

Travel information

Washington County Flights Information

Airlines serving
Frontier Airlines, Alaska Airlines, Southwest Airlines, United, American Airlines, Hawaiian Airlines
Roundtrip price
from $56
Washington County Flights Information

Explore a world of travel with Expedia

*Available to One Key members.