Cheap flight tickets from Portland to Tri-Cities

Compare Portland to Tri-Cities flight deals

Find the cheapest month or even day of the year to fly to Tri-Cities

Book the best Tri-Cities fare with no extra fees

Flight deals from Portland to Tri-Cities

Looking for a cheap last-minute deal or the best return flight from Portland Airport to Tri-Cities Airport? If you want to travel next month, return fares start from RM1,797. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Portland to Tri-Cities

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Portland to Tri-Cities flights are currently cheapest in August.

Portland to Tri-Cities: Alternative routes

Compare routes from Portland to Kingsport below. You may find an airport to fly into that's cheaper, faster, or easier than Tri-Cities.

Portland to Kingsport: Flight information

The things to know before you go.
Cheapest flight foundRM2,013
Cheapest month to flyAugust

Finding cheap flights from Portland to Tri-Cities: Frequently asked questions

The best price we found for a return flight from Portland to Tri-Cities is RM1,567. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Portland to Tri-Cities. But we found flights with one or more stops from RM1,569.
As of August 2026, there are no flights flying from Portland to Tri-Cities.
The cheapest month to fly from Portland to Tri-Cities is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to Tri-Cities Airport on Wednesday, 26 August 2026.
No airlines currently offer direct flights between Portland Airport and Tri-Cities Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Tri-Cities but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Kingsport is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Delta offers the cheapest flight tickets to Tri-Cities.

Travelling from Portland Airport (PDX) to Tri-Cities Airport (TRI): what you need to know

  • Leave plenty of time to make your PDX to TRI flight. It's generally best to arrive at least two hours before international departures and an hour ahead for domestic flights.

  • During popular months such as July, you'll want to get to the airport earlier than normal. Arrive two hours before domestic departures and four hours ahead for international flights when you travel during peak periods in general.

  • We make it easy to book a flight with a stopover. To see your options for tickets from Portland Airport to Tri-Cities Airport, deselect 'Direct flights only.' Then, pick a flight that has a stop long enough to explore the city of your choice. Popular stopovers between PDX and TRI include:

    • Atlanta Hartsfield-Jackson Airport

    • Dallas Fort Worth International Airport

    • Charlotte Douglas Airport

How to find the cheapest flights from Portland Airport (PDX) to Tri-Cities Airport (TRI)

  • RM2,013 is the best price for a one-way Portland Airport to Tri-Cities Airport flight. Return flights start from RM1,569. These fares may change depending on availability and demand.

  • It's usually smart to book in advance if you want to find cheap tickets from PDX to TRI. That's because airlines change prices based on demand, which tends to increase closer to the date of departure.

  • The 'Whole month' search tool shows you the cheapest flights from Portland Airport to Tri-Cities Airport across the entire month. It's a great way to snap up a bargain if your dates are flexible.

  • Cut down on the time spent looking for cheap flights from PDX to TRI by creating a Price Alert. You'll receive an email or notification through the app when a new discounted fare appears.

  • Choose your preferred arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Portland Airport to Tri-Cities Airport.

Handy information about Portland Airport (PDX)

  • PDX is located at 7000 NE Airport Way.

  • Portland Airport scores high marks for on-time performance. 83% of flights that depart PDX reach their destination on time.

  • To reach Portland Airport from central Portland, it'll take about 20 minutes if you're planning to drive. This depends on traffic, however. It's approximately 19 kilometres from the airport to the city centre.

  • The journey on public transport usually takes 40 minutes.

  • Get your journey off to a relaxed start by staying near PDX. Whether you're taking an early flight from Portland Airport to Tri-Cities Airport or just don't want to be rushed, these hotels are perfect:

Arriving at Tri-Cities Airport (TRI)

Getting from Tri-Cities Airport (TRI) to central Kingsport

  • The street address for TRI is 2525 Tennessee 75.

  • Tri-Cities Airport is approximately 18 kilometres from central Kingsport. Driving there takes about 15 minutes.

  • It takes around 35 minutes if you're travelling by public transport.

When to fly to Tri-Cities Airport (TRI)

  • July is the most popular month for flights from Portland Airport to Tri-Cities Airport. To escape the crowds, travel to Kingsport in April.

  • When booking your flight from Portland Airport to Tri-Cities Airport, think about the type of weather you enjoy. July is the warmest month in Kingsport, with temperatures ranging from 16ºC (61ºF) to 31ºC (88ºF).

  • Look for cheap tickets from PDX to TRI in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between -7ºC (19ºF) and 10ºC (50ºF) on average.

Explore more of the United States

  • You've seen Kingsport, now it's time to explore more of the United States. Travel around 386 kilometres north to Columbus to check off its must-visit sights. From Franklin Park Conservatory and Botanical Gardens to Whetstone Park / Park of Roses and Ohio Theatre, you'll have a packed itinerary ahead.

  • Around 483 kilometres north-west of Kingsport, Indianapolis is another essential stop in the United States. Experience the best of this destination with a visit to Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.