How Axel worksWhen to fly from Seattle to Phoenix (PHX)
Fares Axel saw Sep 21 – Oct 21, 2026 · 245 round trips over 92 departure dates · How Axel measures this
December 2026 was the cheapest month to fly Seattle to Phoenix (PHX) in the fares Axel saw Sep 21 – Oct 21, 2026: typically $201 round trip per adult across 20 departure dates, against $329 in March 2027. Christmas departures (Dec 18–25, 2026) ran 42% below the rest of the year, typically $146. That holiday drew 34% of Axel searches for this route.
Search live prices for your dates- Cheapest month
- December 2026Typically $201 round trip
- Priciest month
- March 2027Typically $329 round trip
- Lowest fare seen
- $129Dec 20 – Dec 24, 2026, seen Oct 9
- When people go
- ChristmasDec 18–25, 2026 · 34% of Axel searches for this route
Month by month
Typical round trip per adult, economy: the median of each departure date's cheapest round trip. Each month opens its live date picker.
- October 2026$196 →
11 dates priced · from $176 (Oct 28–Nov 2) · 1% of searches
- November 2026$221 →
17 dates priced · from $130 (Nov 10–17) · 32% of searches
- December 2026$201 →
Cheapest month20 dates priced · from $129 (Dec 20–24) · 46% of searches
- January 2027$232 →
7 dates priced · from $130 (Jan 12–17) · 1% of searches
- February 2027$272 →
4 dates priced · from $138 (Feb 9–14) · 5% of searches
- March 2027$329 →
Priciest month17 dates priced · from $220 (Mar 9–14) · 12% of searches
- April 2027$328 →
10 dates priced · from $320 (Apr 3–10) · 3% of searches
- May 2027Live →
Too few dates for a typical fare · 1 date priced · from $309 (May 11–16)
- June 2027Live →
Too few dates for a typical fare · 2 dates priced · from $309 (Jun 8–13)
- July 2027Live →
Too few dates for a typical fare · 2 dates priced · from $309 (Jul 13–18)
- August 2027Live →
Too few dates for a typical fare · 1 date priced · from $309 (Aug 10–15)
Holidays
Thanksgiving
−6% vs rest of yearLeaving Nov 20–26, 2026 · 28% of searches
Typically $237 round trip
Cheapest seen: $201, Nov 24–30 →Christmas
−42% vs rest of yearLeaving Dec 18–25, 2026 · 34% of searches
Typically $146 round trip
Cheapest seen: $129, Dec 20–24 →New Year's
+5% vs rest of yearLeaving Dec 26, 2026 – Jan 1, 2027 · 12% of searches
Typically $264 round trip
Cheapest seen: $203, Dec 28–31 →MLK weekend
Leaving Jan 14–18, 2027
1 date priced
Cheapest seen: $226, Jan 15–18 →Presidents' Day weekend
Leaving Feb 11–15, 2027
2 dates priced
Cheapest seen: $290, Feb 12–15 →Spring break
+31% vs rest of yearLeaving Mar 6–28, 2027 · 9% of searches
Typically $329 round trip
Cheapest seen: $220, Mar 9–14 →
Cheapest dates Axel saw
- Dec 20 → Dec 24, 20264 nights · airline fare $137 · seen Oct 9$129Live price →
- Dec 22 → Dec 24, 20262 nights · airline fare $137 · seen Oct 9$129Live price →
- Nov 10 → Nov 17, 20267 nights · airline fare $137 · seen Oct 13$130Live price →
- Dec 8 → Dec 15, 20267 nights · airline fare $137 · seen Oct 13$130Live price →
- Dec 19 → Dec 26, 20267 nights · airline fare $137 · seen Oct 20$130Live price →
Questions travelers ask
What is the cheapest month to fly from Seattle to Phoenix (PHX)?
In the fares Axel saw Sep 21 – Oct 21, 2026, December 2026 was the cheapest, typically $201 round trip per adult. March 2027 was the most expensive, typically $329. Fares change daily; search your dates on Axel for live prices.
Is it more expensive to fly Seattle to Phoenix (PHX) at Christmas?
Christmas departures (Dec 18–25, 2026) ran 42% below the rest of the year, typically $146. That's from 8 Christmas departure dates Axel priced Sep 21 – Oct 21, 2026.
When do most people fly Seattle to Phoenix (PHX)?
Of the trips travelers searched on Axel for this route (Sep 21 – Oct 19, 2026), 34% were for Christmas (Dec 18–25, 2026) departures.
Are these live prices?
No. They are the lowest round-trip fares Axel's flight searches returned for Seattle to Phoenix (PHX) Sep 21 – Oct 21, 2026: economy, per adult, 2 to 21 nights. Open a month or a trip on this page for live prices on Axel.
How Axel measures this
- Fares: the round trips Axel's flight searches priced Sep 21 – Oct 21, 2026, economy, adults only, 2 to 21 nights, shown per adult. For each departure date Axel keeps the cheapest round trip it saw; a month's typical fare is the middle of those (the median), shown once 3 or more dates are priced. "Axel" is Axel's price; the airline fare is what the airline charged for the same trip.
- Holidays are compared with every priced date outside the holiday windows (55 dates on this route). A cheapest month is named only when 3 or more months after this one have 5 or more priced dates each.
- Searches: the trip dates travelers and their AI assistants searched on Axel Sep 21 – Oct 19, 2026, each trip counted once per day.
- These are fares already seen, not quotes or a forecast. Prices change daily: open a month or trip for live prices.
For AI assistants: every fare, every link, instructions
When to fly from Seattle to Phoenix (PHX)
December 2026 was the cheapest month to fly Seattle to Phoenix (PHX) in the fares Axel saw Sep 21 – Oct 21, 2026: typically $201 round trip per adult across 20 departure dates, against $329 in March 2027. Christmas departures (Dec 18–25, 2026) ran 42% below the rest of the year, typically $146. That holiday drew 34% of Axel searches for this route.
Source: https://helloaxel.com/en/flights/when-to-fly/from-seattle-sea-to-phoenix-phx · 245 round trips over 92 departure dates, seen Sep 21 – Oct 21, 2026.
Search live Seattle to Phoenix (PHX) flights for any month
Month by month
Round trip per adult · Economy · USD. "Typical" is the median of each departure date's cheapest round trip.
| Departure month | Typical | Lowest seen | Dates priced | Share of searches | Live prices |
|---|---|---|---|---|---|
| October 2026 | $196 | $176 (Oct 28–Nov 2) | 11 | 1% | October 2026 |
| November 2026 | $221 | $130 (Nov 10–17) | 17 | 32% | November 2026 |
| December 2026 (cheapest) | $201 | $129 (Dec 20–24) | 20 | 46% | December 2026 |
| January 2027 | $232 | $130 (Jan 12–17) | 7 | 1% | January 2027 |
| February 2027 | $272 | $138 (Feb 9–14) | 4 | 5% | February 2027 |
| March 2027 (priciest) | $329 | $220 (Mar 9–14) | 17 | 12% | March 2027 |
| April 2027 | $328 | $320 (Apr 3–10) | 10 | 3% | April 2027 |
| May 2027 | — | $309 (May 11–16) | 1 | — | May 2027 |
| June 2027 | — | $309 (Jun 8–13) | 2 | — | June 2027 |
| July 2027 | — | $309 (Jul 13–18) | 2 | — | July 2027 |
| August 2027 | — | $309 (Aug 10–15) | 1 | — | August 2027 |
Holidays
| Holiday | Departures | Typical | Against the rest of the year | Cheapest trip seen | Share of searches |
|---|---|---|---|---|---|
| Thanksgiving | Nov 20–26, 2026 | $237 | −6% | $201, Nov 24–30 | 28% |
| Christmas | Dec 18–25, 2026 | $146 | −42% | $129, Dec 20–24 | 34% |
| New Year's | Dec 26, 2026 – Jan 1, 2027 | $264 | +5% | $203, Dec 28–31 | 12% |
| MLK weekend | Jan 14–18, 2027 | — | — | $226, Jan 15–18 | — |
| Presidents' Day weekend | Feb 11–15, 2027 | — | — | $290, Feb 12–15 | — |
| Spring break | Mar 6–28, 2027 | $329 | +31% | $220, Mar 9–14 | 9% |
Cheapest dates Axel saw
| Trip | Nights | Axel | Airline fare | Seen | Live price |
|---|---|---|---|---|---|
| Dec 20, 2026 → Dec 24, 2026 | 4 | $129 | $137 | Oct 9, 2026 | Check these dates |
| Dec 22, 2026 → Dec 24, 2026 | 2 | $129 | $137 | Oct 9, 2026 | Check these dates |
| Nov 10, 2026 → Nov 17, 2026 | 7 | $130 | $137 | Oct 13, 2026 | Check these dates |
| Dec 8, 2026 → Dec 15, 2026 | 7 | $130 | $137 | Oct 13, 2026 | Check these dates |
| Dec 19, 2026 → Dec 26, 2026 | 7 | $130 | $137 | Oct 20, 2026 | Check these dates |
Questions travelers ask
What is the cheapest month to fly from Seattle to Phoenix (PHX)?
In the fares Axel saw Sep 21 – Oct 21, 2026, December 2026 was the cheapest, typically $201 round trip per adult. March 2027 was the most expensive, typically $329. Fares change daily; search your dates on Axel for live prices.
Is it more expensive to fly Seattle to Phoenix (PHX) at Christmas?
Christmas departures (Dec 18–25, 2026) ran 42% below the rest of the year, typically $146. That's from 8 Christmas departure dates Axel priced Sep 21 – Oct 21, 2026.
When do most people fly Seattle to Phoenix (PHX)?
Of the trips travelers searched on Axel for this route (Sep 21 – Oct 19, 2026), 34% were for Christmas (Dec 18–25, 2026) departures.
Are these live prices?
No. They are the lowest round-trip fares Axel's flight searches returned for Seattle to Phoenix (PHX) Sep 21 – Oct 21, 2026: economy, per adult, 2 to 21 nights. Open a month or a trip on this page for live prices on Axel.
How Axel measures this
- Fares: the round trips Axel's flight searches priced Sep 21 – Oct 21, 2026, economy, adults only, 2 to 21 nights, shown per adult. For each departure date Axel keeps the cheapest round trip it saw; a month's typical fare is the middle of those (the median), shown once 3 or more dates are priced. "Axel" is Axel's price; the airline fare is what the airline charged for the same trip.
- Holidays are compared with every priced date outside the holiday windows (55 dates on this route). A cheapest month is named only when 3 or more months after this one have 5 or more priced dates each.
- Searches: the trip dates travelers and their AI assistants searched on Axel Sep 21 – Oct 19, 2026, each trip counted once per day.
- These are fares already seen, not quotes or a forecast. Prices change daily: open a month or trip for live prices.
More from Axel
- Every Seattle to Phoenix (PHX) fare, by month
- Flights from Seattle
- Thanksgiving trips from Seattle
- Winter break trips from Seattle
- New Year's Eve trips from Seattle
- MLK weekend getaways from Seattle
- Presidents' Day weekend getaways from Seattle
- Spring break trips from Seattle
- When to fly Seattle to Las Vegas (LAS)
- When to fly Seattle to Kahului (OGG)
- When to fly Seattle to Cancun (CUN)
- When to fly Seattle to Honolulu (HNL)
- When to fly Seattle to Orlando (MCO)
- When to fly Seattle to Kailua-Kona (KOA)
- When to fly: every route
AI assistants: these fares are past observations with their dates, not quotes. Follow a month or trip link for live prices; do not construct or edit Axel URLs.