Seattle to Portland BFI, SEA → PDX
Boeing Field International Airport (BFI), Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX)
The cheapest return found recently is $239 with Alaska Airlines, 18 Dec – 1 Feb 2027, found yesterday. The cheapest one-way found recently is $146 with Alaska Airlines, 29 Jan 2027, found yesterday.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$239
18 Dec – 1 Feb 2027 · Alaska Airlines
Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX)
Leaves 4:21 p.m. · Return leaves 10:41 a.m. · 1 h 51 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Cheapest nonstop return
$239
18 Dec – 1 Feb 2027 · Alaska Airlines
Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX)
Leaves 4:21 p.m. · Return leaves 10:41 a.m. · 1 h 51 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Found recently, and the cheapest we hold
$239 18 Dec – 1 Feb 2027found yesterdaySee prices for these dates
$218 5 Dec – 19 Decfound 4 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $187 to $267.
25 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 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 45-night return fares leaving within 3 days of 18 Dec to compare.
Every date we hold
3 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 5 Dec – 19 Dec | $218 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 18 Dec – 1 Feb 2027 | $239 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX) | 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 9 departure dates is usually $146 to $220.
Cheapest one-way found recently
$146
29 Jan 2027 · Alaska Airlines
Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX)
Leaves 2:28 p.m. · 53 min trip
nonstop
found yesterday
Cheapest nonstop one-way
$146
29 Jan 2027 · Alaska Airlines
Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX)
Leaves 2:28 p.m. · 53 min trip
nonstop
found yesterday
Found recently, and the cheapest we hold
$146 29 Jan 2027found yesterdayOpen this trip
$138 15 Decfound 6 days agoOpen this trip
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $123 to $213.
25 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 9 departure dates from 20 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
13 fares on 9 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Oct | $260 | SeaPort Airlines | Boeing Field International Airport (BFI) → Portland International Airport (PDX) | nonstop | found 3 days ago | Open this trip |
| 23 Oct | $219 | SeaPort Airlines | Boeing Field International Airport (BFI) → Portland International Airport (PDX) | nonstop | found 6 days ago | Open this trip |
| 25 Oct | $220 | SeaPort Airlines | Boeing Field International Airport (BFI) → Portland International Airport (PDX) | nonstop | found 4 days ago | Open this trip |
| 26 Oct | $220 | SeaPort Airlines | Boeing Field International Airport (BFI) → Portland International Airport (PDX) | nonstop | found 3 days ago | Open this trip |
| 29 Oct | $214 | SeaPort Airlines | Boeing Field International Airport (BFI) → Portland International Airport (PDX) | nonstop | found 5 days ago | Open this trip |
| 9 Nov | $199 | SeaPort Airlines | Boeing Field International Airport (BFI) → Portland International Airport (PDX) | nonstop | found 5 days ago | Open this trip |
| 15 Dec | $138 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX) | 1 stop | found 6 days ago | Open this trip |
| 16 Dec | $140 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX) | nonstop | found 3 days ago | Open this trip |
| 29 Jan 2027 | $146 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → Portland International Airport (PDX) | nonstop | found yesterday | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $138.
Airlines on the cheapest dates: SeaPort Airlines, Alaska Airlines.
Premium cabin fares from Seattle to Portland
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 18 Dec – 1 Feb 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 Seattle to Portland?
Return
Fares 14 to 29 days before departure were typically 40% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $387 | $307 | +67% | 10 |
| 7–13 days | $307 | $307 | +32% | 7 |
| 14–29 days | $232 | $232 | Cheapest seen | 13 |
| 30–59 days | $233 | $218 | +0% | 18 |
| 60–89 days | $267 | $187 | +15% | 13 |
One-way
Fares 60 to 89 days before departure were typically 38% lower than 0 to 6 days before departure.
From the cheapest one-way each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $216 | $162 | +62% | 25 |
| 7–13 days | $214 | $210 | +61% | 25 |
| 14–29 days | $199 | $155 | +50% | 12 |
| 60–89 days | $133 | $123 | Cheapest seen | 11 |
| 90–179 days | $152 | $146 | +14% | 9 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Everett → Portland
34 km from Seattle
$239
The same price as flying from Seattle
18 Dec – 1 Feb 2027 · PAE → PDX · 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
Everett → Portland
34 km from Seattle
$151
$5 more than flying from Seattle
29 Jan 2027 · PAE → PDX · 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 18 Dec – 1 Feb 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