Route guide · 129 miles
Cheap Flights from Portland to Seattle
PDX → SEA · Nonstop 0h 46m · Live round-trip fares
Plenty of travelers price out Portland to Seattle every day — here's how to beat the average fare. Nonstops run about 0h 46m, and the calendar matters more than the airline. Aim to book 2–4 weeks ahead, stay flexible on the day of the week, and set a free alert so a price drop never slips past you.
Live fares for PDX → SEA are updating. Use the search below for real-time prices.
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Updated daily
Flight time
0h 46m
Nonstop, typical
Distance
129 mi
PDX → SEA
Book ahead
2–4 weeks
Best window, typically
Nonstop airlines
2
Alaska Airlines, United Airlines
Nonstop flights from Portland to Seattle
Want to skip the layover? Nonstops from Portland to Seattle are flown by Alaska Airlines, United Airlines, getting you there in about 0h 46m. For the lowest fares, book around 2–4 weeks before departure — last-minute nonstops on this route rarely come cheap.
Booking insights: Portland → Seattle
- Distance: 129 miles · nonstop flight time: 0h 46m.
- Cheapest upcoming week in the live data starts around Oct 15, with fares from $131.
- Rule of thumb for this route: the sweet spot is usually 2–4 weeks before departure.
- Midweek departures (Tue–Thu) are consistently cheaper than weekend flights.
- Set a free Airfare Deal alert instead of checking daily — the best fares can sell out in hours.
Price trend
Cheapest departure weeks ahead
Near-term departures around Oct 15 are currently the cheapest on this route. Based on recent fares found for this route; prices change quickly.
Cheapest month · Portland → Seattle
October 2026
Every date's recent round-trip fare, at a glance.
Fares from
$131
Cheapest: Mon, Oct 19 — $131 · Priciest: Oct 21 — $219
Get this fare →Recent fares found for specific dates in October 2026. Blank days had no recent fare in our data — ask our team and we'll check them for you.
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Flying from Portland to Seattle: what you need to know
The flight
Portland to Seattle is a short hop — 129 miles, about 0h 46m gate to gate on a nonstop. You'll spend almost as long taxiing and boarding as you will in the air, so the real time-saver on this route is picking flight times that dodge rush hour at both ends.
Airlines on this route
Alaska Airlines and United Airlines fly this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from Portland (PDX)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our Portland airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Seattle (SEA)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Seattle airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Seattle to Portland fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 129 miles, booking 2–4 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
- Nonstop time on this route is about 0h 46m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
- Tuesday and Wednesday departures are typically the cheapest days on domestic routes.
- Screenshot your fare before you enquire — prices move, and a saved fare helps our team match or beat it.
Portland to Seattle flight FAQs
How long is the flight from PDX to SEA?
A nonstop from PDX to SEA clocks in at around 0h 46m for the 129-mile trip. If you're connecting, budget an extra 2–4 hours depending on where you stop.
Are there nonstop flights from Portland to Seattle?
Yes — look for Alaska Airlines, United Airlines on this route. Nonstop seats are usually priced best 2–4 weeks before departure.
What is the cheapest month to fly from Portland to Seattle?
There's no single magic month, but prices on this route generally soften in the shoulder season, when demand dips after the holidays and again in early fall. A free fare alert is the easiest way to catch those windows.
How much are last minute flights from PDX to SEA?
Last-minute flights from PDX to SEA (booked within 7 days of departure) typically cost noticeably more than fares booked 2–4 weeks out. Booking early is the smarter move.
What is a good round-trip deal from Portland to Seattle?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from Portland to Seattle?
The main carriers on this route are Alaska Airlines, United Airlines. Comparing all of them on the live search below usually surfaces the lowest fare for your dates.
How early should I get to Portland airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
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