Seattle to Phoenix BFI, SEA → PHX
Boeing Field International Airport (BFI), Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX)
The cheapest return found recently is $259 with Frontier Airlines, 10 Feb 2027 – 17 Feb 2027, found 5 days ago. The cheapest one-way found recently is $124 with Hawaiian Airlines, 28 Oct, found yesterday.
Return
The cheapest return fare on each of 4 departure dates is usually $306 to $365.
Cheapest return found recently
$259
10 Feb 2027 – 17 Feb 2027 · Frontier Airlines
Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX)
Leaves 4:29 p.m. · Return leaves 7:35 a.m. · 15 h 39 min of travel, both ways together
out 1 stop, back 1 stop
found 5 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$259 10 Feb 2027 – 17 Feb 2027found 5 days agoSee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $193 to $290.
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?
Compared with the cheapest return fare on each of 4 departure dates from 21 Oct to 10 Feb 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 7-night return fares leaving within 3 days of 10 Feb 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 | |
|---|---|---|---|---|---|---|
| 21 Oct – 24 Oct | $362 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 22 Oct – 23 Oct | $375 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX) | out nonstop, back 1 stop | found 6 days ago | See prices for these dates |
| 20 Dec – 2 Jan 2027 | $321 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 10 Feb 2027 – 17 Feb 2027 | $259 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
Which month looks cheapest?
February 2027 is the cheapest month — from $259.
Airlines on the cheapest dates: Frontier Airlines, Alaska Airlines.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $104 to $130.
Cheapest one-way found recently
$124
28 Oct · Hawaiian Airlines
Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX)
Leaves 4:59 p.m. · 2 h 52 min trip
stops unknown
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$124 28 Octfound yesterdayOpen this trip
$83 16 Novfound 4 days agoOpen this trip
What have prices looked like?
Over 23 days, 25 Sept to 18 Oct, the cheapest one-way we saw each day was $58 to $441.
23 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 3 departure dates from 27 Oct to 16 Nov, 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?
No. We hold one-way fares on 1 other departure date within 3 days of 28 Oct, and it is not cheaper.
Every date we hold
4 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 27 Oct | $136 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX) | stops unknown | found 2 days ago | Open this trip |
| 28 Oct | $124 | Hawaiian Airlines | Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX) | stops unknown | found yesterday | Open this trip |
| 16 Nov | $83 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → Phoenix Sky Harbor International Airport (PHX) | 1 stop | found 4 days ago | Open this trip |
Which month looks cheapest?
November 2026 is the cheapest month — from $83.
Airlines on the cheapest dates: Frontier Airlines, Hawaiian Airlines.
Premium cabin fares from Seattle to Phoenix
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 10 Feb 2027 – 17 Feb 2027 in another cabin: Premium economy · Business · First
Today's prices for 28 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Seattle to Phoenix?
Return
Fares 14 to 29 days before departure were typically 38% 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 | $362 | $288 | +61% | 19 |
| 7–13 days | $288 | $285 | +28% | 12 |
| 14–29 days | $225 | $193 | Cheapest seen | 19 |
| 30–59 days | $239 | $239 | +6% | 8 |
| 60–89 days | $296 | $279 | +32% | 21 |
| 90–179 days | $259 | $257 | +15% | 17 |
One-way
Not enough history yet: in 23 days of one-way prices, 25 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
Everett → Phoenix
34 km from Seattle
$359
$100 more than flying from Seattle
10 Feb 2027 – 17 Feb 2027 · PAE → PHX · out 1 stop, back nonstop
found 5 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Bellingham → Phoenix
128 km from Seattle
$213
$89 more than flying from Seattle
26 Oct · BLI → PHX · 1 stop
found 3 days ago
Everett → Phoenix
34 km from Seattle
$263
$139 more than flying from Seattle
27 Oct · PAE → PHX · nonstop
found 2 days ago
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 10 Feb 2027 – 17 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