Portland to Seattle PDX → SEA
Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA)
The cheapest return found recently is $305 with Alaska Airlines, 6 Mar 2027 – 31 Mar 2027, found yesterday. The cheapest one-way found recently is $148 with Alaska Airlines, 29 Jan 2027, found yesterday.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$305
6 Mar 2027 – 31 Mar 2027 · Alaska Airlines
Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA)
Leaves 1:59 p.m. · Return leaves 12:33 p.m. · 1 h 57 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Cheapest nonstop return
$305
6 Mar 2027 – 31 Mar 2027 · Alaska Airlines
Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA)
Leaves 1:59 p.m. · Return leaves 12:33 p.m. · 1 h 57 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Found recently, and the cheapest we hold
$305 6 Mar 2027 – 31 Mar 2027found yesterdaySee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 14 days, 3 Oct to 18 Oct, the cheapest return we saw each day was $227 to $306.
14 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Not enough comparable prices yet: we hold return fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 25-night return fares leaving within 3 days of 6 Mar 2027 to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 6 Mar 2027 – 31 Mar 2027 | $305 | Alaska Airlines | Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA) | out nonstop, back nonstop | found yesterday | See prices for these dates |
Airlines on the cheapest dates: Alaska Airlines.
One-way
The cheapest one-way fare on each of 4 departure dates is usually $144 to $173.
Cheapest one-way found recently
$148
29 Jan 2027 · Alaska Airlines
Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA)
Leaves 4:03 p.m. · 56 min trip
nonstop
found yesterday
Cheapest nonstop one-way
$148
29 Jan 2027 · Alaska Airlines
Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA)
Leaves 4:03 p.m. · 56 min trip
nonstop
found yesterday
Found recently, and the cheapest we hold
$148 29 Jan 2027found yesterdayOpen this trip
$131 15 Decfound 6 days agoOpen this trip
What have prices looked like?
Over 15 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $120 to $208.
15 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 4 departure dates from 25 Oct to 29 Jan 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 29 Jan 2027 to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 25 Oct | $166 | Alaska Airlines | Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA) | 1 stop | found 4 days ago | Open this trip |
| 27 Oct | $194 | Alaska Airlines | Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA) | 1 stop | found 2 days ago | Open this trip |
| 15 Dec | $131 | Alaska Airlines | Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA) | 1 stop | found 6 days ago | Open this trip |
| 29 Jan 2027 | $148 | Alaska Airlines | Portland International Airport (PDX) → Seattle-Tacoma International Airport (SEA) | nonstop | found yesterday | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $131.
Airlines on the cheapest dates: Alaska Airlines.
Premium cabin fares from Portland to Seattle
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 6 Mar 2027 – 31 Mar 2027 in another cabin: Premium economy · Business · First
Today's prices for 29 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Portland to Seattle?
Return
Not enough history yet: in 14 days of return prices, 3 Oct to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
One-way
Not enough history yet: in 15 days of one-way prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Portland → Everett
34 km from Seattle
$239
$66 less than flying to Seattle
18 Dec – 1 Feb 2027 · PDX → PAE · out nonstop, back nonstop
found yesterday
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Portland → Everett
34 km from Seattle
$230
$82 more than flying to Seattle
31 Mar 2027 · PDX → PAE · nonstop
found yesterday
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 6 Mar 2027 – 31 Mar 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work