Travel with Axel, get the best price.

Route overview: Boise to Phoenix (PHX) flight deals

Boise (BOI) to Phoenix (PHX), Dec 18–20, 2026: from $104 one way

Boise (BOI) to Phoenix (PHX), Dec 18–20, 2026: from $104 one way on Axel, checked Oct 29, 2026. Lowest published fare: $104 one way, Axel-exclusive, Frontier Airlines, 1 stop, Dec 18, 2026, 1 adult, economy, checked Oct 29, 2026.

BOI → PHX1 adulteconomyOne way

33 flight options · 6 airlines

Nonstop flights

Fri, Dec 18 · One way

Southwest Airlines
1:00 pmBOI
2h
Nonstop
3:00 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

Alaska Airlines
7:00 amBOI
2h 22m
Nonstop
9:22 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

American Airlines
1:57 pmBOI
2h 16m
Nonstop
4:13 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

Southwest Airlines
1:00 pmBOI
2h
Nonstop
3:00 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

Southwest Airlines
1:00 pmBOI
2h
Nonstop
3:00 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

Southwest Airlines
6:10 pmBOI
2h
Nonstop
8:10 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

American Airlines
8:50 amBOI
2h 34m
Nonstop
11:24 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

Southwest Airlines
6:10 pmBOI
2h
Nonstop
8:10 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

Southwest Airlines
9:10 amBOI
2h 10m
Nonstop
11:20 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

Alaska Airlines
7:00 amBOI
2h 19m
Nonstop
9:19 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

Alaska Airlines
7:12 amBOI
2h 16m
Nonstop
9:28 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

American Airlines
7:40 amBOI
2h 30m
Nonstop
10:10 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

American Airlines
7:40 amBOI
2h 30m
Nonstop
10:10 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

American Airlines
2:03 pmBOI
2h 6m
Nonstop
4:09 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

American Airlines
5:55 pmBOI
2h 24m
Nonstop
8:19 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Fri, Dec 18 · One way

Frontier Airlines
7:55 pmBOI
4h 38m
LAS · 1h 28m
12:33 am+1PHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

Delta Air Lines
1:07 pmBOI
4h 10m
SLC · 1h 10m
5:17 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

United Airlines
2:48 pmBOI
5h 10m
DEN · 1h 9m
7:58 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

Frontier Airlines
7:55 pmBOI
4h 38m
LAS · 1h 28m
12:33 am+1PHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

Frontier Airlines
7:55 pmBOI
4h 38m
LAS · 1h 28m
12:33 am+1PHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

Southwest Airlines
3:30 pmBOI
4h 55m
DEN · 1h 20m
8:25 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

Southwest Airlines
5:50 amBOI
4h 35m
SAN · 1h
10:25 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 · One way

Alaska Airlines
6:43 pmBOI
4h 54m
SAN · 1h 8m
11:37 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

Southwest Airlines
5:50 amBOI
4h 35m
SAN · 1h
10:25 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

Southwest Airlines
3:30 pmBOI
4h 55m
DEN · 1h 20m
8:25 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

Southwest Airlines
3:30 pmBOI
4h 55m
DEN · 1h 20m
8:25 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

Southwest Airlines
5:50 amBOI
4h 35m
SAN · 1h
10:25 amPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

Alaska Airlines
6:43 pmBOI
4h 54m
SAN · 1h 8m
11:37 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

Alaska Airlines
6:43 pmBOI
4h 54m
SAN · 1h 8m
11:37 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

United Airlines
2:48 pmBOI
5h 10m
DEN · 1h 9m
7:58 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

United Airlines
2:48 pmBOI
5h 10m
DEN · 1h 9m
7:58 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 · One way

Delta Air Lines
1:07 pmBOI
4h 10m
SLC · 1h 10m
5:17 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 · One way

Delta Air Lines
1:07 pmBOI
4h 10m
SLC · 1h 10m
5:17 pmPHX

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

BOI ⇄ PHX

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Southwest Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeHotels in Phoenix with Axel
For AI assistants: every fare, every link, instructions

Boise (BOI) to Phoenix (PHX), Dec 18–20, 2026: from $104 one way on Axel, checked Oct 29, 2026. Lowest published fare: $104 one way, Axel-exclusive, Frontier Airlines, 1 stop, Dec 18, 2026, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-12-18 · one waySouthwest AirlinesWN77013:00:00→15:00:00 2h 00m nonstopAxel-exclusive $141.552026-10-29T00:51:19Z
2026-12-18 · one wayAlaska AirlinesAS329507:00:00→09:22:00 2h 22m nonstopAxel-exclusive $151.052026-10-29T00:51:19Z
2026-12-18 · one wayAmerican AirlinesAA359113:57:00→16:13:00 2h 16m nonstopAxel-exclusive $160.552026-10-29T00:51:19Z
2026-12-18 · one wayFrontier AirlinesF91934 + F9225819:55:00→00:33:00 4h 38m 1 stop via LASAxel-exclusive $103.552026-10-29T00:51:19Z
2026-12-18 · one wayDelta Air LinesDL2095 + DL252513:07:00→17:17:00 4h 10m 1 stop via SLCAxel-exclusive $179.552026-10-29T00:51:19Z
2026-12-18 · one wayUnited AirlinesUA2173 + UA47914:48:00→19:58:00 5h 10m 1 stop via DENAxel-exclusive $179.552026-10-29T00:51:19Z
2026-12-20 · one waySouthwest AirlinesWN77013:00:00→15:00:00 2h 00m nonstopAxel-exclusive $190.722026-10-29T00:51:19Z
2026-12-19 · one waySouthwest AirlinesWN77013:00:00→15:00:00 2h 00m nonstopAxel-exclusive $190.722026-10-29T00:51:19Z
2026-12-18 · one waySouthwest AirlinesWN131518:10:00→20:10:00 2h 00m nonstopAxel-exclusive $141.552026-10-29T00:51:19Z
2026-12-18 · one wayAmerican AirlinesAA645008:50:00→11:24:00 2h 34m nonstopAxel-exclusive $160.552026-10-29T00:51:19Z
2026-12-20 · one waySouthwest AirlinesWN131518:10:00→20:10:00 2h 00m nonstopAxel-exclusive $190.722026-10-29T00:51:19Z
2026-12-19 · one waySouthwest AirlinesWN486109:10:00→11:20:00 2h 10m nonstopAxel-exclusive $190.722026-10-29T00:51:19Z
2026-12-20 · one wayAlaska AirlinesAS218307:00:00→09:19:00 2h 19m nonstopAxel-exclusive $203.522026-10-29T00:51:19Z
2026-12-19 · one wayAlaska AirlinesAS218307:12:00→09:28:00 2h 16m nonstopAxel-exclusive $203.522026-10-29T00:51:19Z
2026-12-19 · one wayAmerican AirlinesAA206107:40:00→10:10:00 2h 30m nonstopAxel-exclusive $216.322026-10-29T00:51:19Z
2026-12-20 · one wayAmerican AirlinesAA206107:40:00→10:10:00 2h 30m nonstopAxel-exclusive $216.322026-10-29T00:51:19Z
2026-12-19 · one wayAmerican AirlinesAA234114:03:00→16:09:00 2h 06m nonstopAxel-exclusive $216.322026-10-29T00:51:19Z
2026-12-20 · one wayAmerican AirlinesAA627717:55:00→20:19:00 2h 24m nonstopAxel-exclusive $216.322026-10-29T00:51:19Z
2026-12-19 · one wayFrontier AirlinesF91934 + F9225819:55:00→00:33:00 4h 38m 1 stop via LASAxel-exclusive $139.522026-10-29T00:51:19Z
2026-12-20 · one wayFrontier AirlinesF91934 + F9225819:55:00→00:33:00 4h 38m 1 stop via LASAxel-exclusive $139.522026-10-29T00:51:19Z
2026-12-18 · one waySouthwest AirlinesWN760 + WN26215:30:00→20:25:00 4h 55m 1 stop via DENAxel-exclusive $151.052026-10-29T00:51:19Z
2026-12-18 · one waySouthwest AirlinesWN4928 + WN25005:50:00→10:25:00 4h 35m 1 stop via SANAxel-exclusive $151.052026-10-29T00:51:19Z
2026-12-18 · one wayAlaska AirlinesAS2421 + AS229718:43:00→23:37:00 4h 54m 1 stop via SANAxel-exclusive $170.052026-10-29T00:51:19Z
2026-12-20 · one waySouthwest AirlinesWN4928 + WN25005:50:00→10:25:00 4h 35m 1 stop via SANAxel-exclusive $203.522026-10-29T00:51:19Z
2026-12-20 · one waySouthwest AirlinesWN760 + WN26215:30:00→20:25:00 4h 55m 1 stop via DENAxel-exclusive $203.522026-10-29T00:51:19Z
2026-12-19 · one waySouthwest AirlinesWN760 + WN26215:30:00→20:25:00 4h 55m 1 stop via DENAxel-exclusive $203.522026-10-29T00:51:19Z
2026-12-19 · one waySouthwest AirlinesWN4928 + WN25005:50:00→10:25:00 4h 35m 1 stop via SANAxel-exclusive $203.522026-10-29T00:51:19Z
2026-12-19 · one wayAlaska AirlinesAS2421 + AS229718:43:00→23:37:00 4h 54m 1 stop via SANAxel-exclusive $229.122026-10-29T00:51:19Z
2026-12-20 · one wayAlaska AirlinesAS2421 + AS229718:43:00→23:37:00 4h 54m 1 stop via SANAxel-exclusive $229.122026-10-29T00:51:19Z
2026-12-19 · one wayUnited AirlinesUA2173 + UA47914:48:00→19:58:00 5h 10m 1 stop via DENAxel-exclusive $241.922026-10-29T00:51:19Z
2026-12-20 · one wayUnited AirlinesUA2173 + UA47914:48:00→19:58:00 5h 10m 1 stop via DENAxel-exclusive $241.922026-10-29T00:51:19Z
2026-12-20 · one wayDelta Air LinesDL2095 + DL252513:07:00→17:17:00 4h 10m 1 stop via SLCAxel-exclusive $241.922026-10-29T00:51:19Z
2026-12-19 · one wayDelta Air LinesDL2095 + DL252513:07:00→17:17:00 4h 10m 1 stop via SLCAxel-exclusive $241.922026-10-29T00:51:19Z

Route overview: Boise to Phoenix (PHX) flight deals

2026-12-18 · one way · Axel-exclusive $141.55

  • Southwest Airlines WN770: BOI 2026-12-18 13:00:00 → PHX 2026-12-18 15:00:00; nonstop; 120 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $151.05

  • Alaska Airlines AS3295: BOI 2026-12-18 07:00:00 → PHX 2026-12-18 09:22:00; nonstop; 142 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $160.55

  • American Airlines AA3591: BOI 2026-12-18 13:57:00 → PHX 2026-12-18 16:13:00; nonstop; 136 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $103.55

  • Frontier Airlines F91934 / F92258: BOI 2026-12-18 19:55:00 → PHX 2026-12-19 00:33:00; 1 stop(s) via LAS; 278 minutes. Local airport times.
    • F91934: BOI 2026-12-18 19:55:00 → LAS 2026-12-18 20:49:00; layover at LAS: 88 minutes.
    • F92258: LAS 2026-12-18 22:17:00 → PHX 2026-12-19 00:33:00.

2026-12-18 · one way · Axel-exclusive $179.55

  • Delta Air Lines DL2095 / DL2525: BOI 2026-12-18 13:07:00 → PHX 2026-12-18 17:17:00; 1 stop(s) via SLC; 250 minutes. Local airport times.
    • DL2095: BOI 2026-12-18 13:07:00 → SLC 2026-12-18 14:25:00; layover at SLC: 70 minutes.
    • DL2525: SLC 2026-12-18 15:35:00 → PHX 2026-12-18 17:17:00.

2026-12-18 · one way · Axel-exclusive $179.55

  • United Airlines UA2173 / UA479: BOI 2026-12-18 14:48:00 → PHX 2026-12-18 19:58:00; 1 stop(s) via DEN; 310 minutes. Local airport times.
    • UA2173: BOI 2026-12-18 14:48:00 → DEN 2026-12-18 16:45:00; layover at DEN: 69 minutes.
    • UA479: DEN 2026-12-18 17:54:00 → PHX 2026-12-18 19:58:00.

2026-12-20 · one way · Axel-exclusive $190.72

  • Southwest Airlines WN770: BOI 2026-12-20 13:00:00 → PHX 2026-12-20 15:00:00; nonstop; 120 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $190.72

  • Southwest Airlines WN770: BOI 2026-12-19 13:00:00 → PHX 2026-12-19 15:00:00; nonstop; 120 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $141.55

  • Southwest Airlines WN1315: BOI 2026-12-18 18:10:00 → PHX 2026-12-18 20:10:00; nonstop; 120 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $160.55

  • American Airlines AA6450: BOI 2026-12-18 08:50:00 → PHX 2026-12-18 11:24:00; nonstop; 154 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $190.72

  • Southwest Airlines WN1315: BOI 2026-12-20 18:10:00 → PHX 2026-12-20 20:10:00; nonstop; 120 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $190.72

  • Southwest Airlines WN4861: BOI 2026-12-19 09:10:00 → PHX 2026-12-19 11:20:00; nonstop; 130 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $203.52

  • Alaska Airlines AS2183: BOI 2026-12-20 07:00:00 → PHX 2026-12-20 09:19:00; nonstop; 139 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $203.52

  • Alaska Airlines AS2183: BOI 2026-12-19 07:12:00 → PHX 2026-12-19 09:28:00; nonstop; 136 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $216.32

  • American Airlines AA2061: BOI 2026-12-19 07:40:00 → PHX 2026-12-19 10:10:00; nonstop; 150 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $216.32

  • American Airlines AA2061: BOI 2026-12-20 07:40:00 → PHX 2026-12-20 10:10:00; nonstop; 150 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $216.32

  • American Airlines AA2341: BOI 2026-12-19 14:03:00 → PHX 2026-12-19 16:09:00; nonstop; 126 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $216.32

  • American Airlines AA6277: BOI 2026-12-20 17:55:00 → PHX 2026-12-20 20:19:00; nonstop; 144 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $139.52

  • Frontier Airlines F91934 / F92258: BOI 2026-12-19 19:55:00 → PHX 2026-12-20 00:33:00; 1 stop(s) via LAS; 278 minutes. Local airport times.
    • F91934: BOI 2026-12-19 19:55:00 → LAS 2026-12-19 20:49:00; layover at LAS: 88 minutes.
    • F92258: LAS 2026-12-19 22:17:00 → PHX 2026-12-20 00:33:00.

2026-12-20 · one way · Axel-exclusive $139.52

  • Frontier Airlines F91934 / F92258: BOI 2026-12-20 19:55:00 → PHX 2026-12-21 00:33:00; 1 stop(s) via LAS; 278 minutes. Local airport times.
    • F91934: BOI 2026-12-20 19:55:00 → LAS 2026-12-20 20:49:00; layover at LAS: 88 minutes.
    • F92258: LAS 2026-12-20 22:17:00 → PHX 2026-12-21 00:33:00.

2026-12-18 · one way · Axel-exclusive $151.05

  • Southwest Airlines WN760 / WN262: BOI 2026-12-18 15:30:00 → PHX 2026-12-18 20:25:00; 1 stop(s) via DEN; 295 minutes. Local airport times.
    • WN760: BOI 2026-12-18 15:30:00 → DEN 2026-12-18 17:10:00; layover at DEN: 80 minutes.
    • WN262: DEN 2026-12-18 18:30:00 → PHX 2026-12-18 20:25:00.

2026-12-18 · one way · Axel-exclusive $151.05

  • Southwest Airlines WN4928 / WN250: BOI 2026-12-18 05:50:00 → PHX 2026-12-18 10:25:00; 1 stop(s) via SAN; 275 minutes. Local airport times.
    • WN4928: BOI 2026-12-18 05:50:00 → SAN 2026-12-18 07:05:00; layover at SAN: 60 minutes.
    • WN250: SAN 2026-12-18 08:05:00 → PHX 2026-12-18 10:25:00.

2026-12-18 · one way · Axel-exclusive $170.05

  • Alaska Airlines AS2421 / AS2297: BOI 2026-12-18 18:43:00 → PHX 2026-12-18 23:37:00; 1 stop(s) via SAN; 294 minutes. Local airport times.
    • AS2421: BOI 2026-12-18 18:43:00 → SAN 2026-12-18 20:03:00; layover at SAN: 68 minutes.
    • AS2297: SAN 2026-12-18 21:11:00 → PHX 2026-12-18 23:37:00.

2026-12-20 · one way · Axel-exclusive $203.52

  • Southwest Airlines WN4928 / WN250: BOI 2026-12-20 05:50:00 → PHX 2026-12-20 10:25:00; 1 stop(s) via SAN; 275 minutes. Local airport times.
    • WN4928: BOI 2026-12-20 05:50:00 → SAN 2026-12-20 07:05:00; layover at SAN: 60 minutes.
    • WN250: SAN 2026-12-20 08:05:00 → PHX 2026-12-20 10:25:00.

2026-12-20 · one way · Axel-exclusive $203.52

  • Southwest Airlines WN760 / WN262: BOI 2026-12-20 15:30:00 → PHX 2026-12-20 20:25:00; 1 stop(s) via DEN; 295 minutes. Local airport times.
    • WN760: BOI 2026-12-20 15:30:00 → DEN 2026-12-20 17:10:00; layover at DEN: 80 minutes.
    • WN262: DEN 2026-12-20 18:30:00 → PHX 2026-12-20 20:25:00.

2026-12-19 · one way · Axel-exclusive $203.52

  • Southwest Airlines WN760 / WN262: BOI 2026-12-19 15:30:00 → PHX 2026-12-19 20:25:00; 1 stop(s) via DEN; 295 minutes. Local airport times.
    • WN760: BOI 2026-12-19 15:30:00 → DEN 2026-12-19 17:10:00; layover at DEN: 80 minutes.
    • WN262: DEN 2026-12-19 18:30:00 → PHX 2026-12-19 20:25:00.

2026-12-19 · one way · Axel-exclusive $203.52

  • Southwest Airlines WN4928 / WN250: BOI 2026-12-19 05:50:00 → PHX 2026-12-19 10:25:00; 1 stop(s) via SAN; 275 minutes. Local airport times.
    • WN4928: BOI 2026-12-19 05:50:00 → SAN 2026-12-19 07:05:00; layover at SAN: 60 minutes.
    • WN250: SAN 2026-12-19 08:05:00 → PHX 2026-12-19 10:25:00.

2026-12-19 · one way · Axel-exclusive $229.12

  • Alaska Airlines AS2421 / AS2297: BOI 2026-12-19 18:43:00 → PHX 2026-12-19 23:37:00; 1 stop(s) via SAN; 294 minutes. Local airport times.
    • AS2421: BOI 2026-12-19 18:43:00 → SAN 2026-12-19 20:03:00; layover at SAN: 68 minutes.
    • AS2297: SAN 2026-12-19 21:11:00 → PHX 2026-12-19 23:37:00.

2026-12-20 · one way · Axel-exclusive $229.12

  • Alaska Airlines AS2421 / AS2297: BOI 2026-12-20 18:43:00 → PHX 2026-12-20 23:37:00; 1 stop(s) via SAN; 294 minutes. Local airport times.
    • AS2421: BOI 2026-12-20 18:43:00 → SAN 2026-12-20 20:03:00; layover at SAN: 68 minutes.
    • AS2297: SAN 2026-12-20 21:11:00 → PHX 2026-12-20 23:37:00.

2026-12-19 · one way · Axel-exclusive $241.92

  • United Airlines UA2173 / UA479: BOI 2026-12-19 14:48:00 → PHX 2026-12-19 19:58:00; 1 stop(s) via DEN; 310 minutes. Local airport times.
    • UA2173: BOI 2026-12-19 14:48:00 → DEN 2026-12-19 16:45:00; layover at DEN: 69 minutes.
    • UA479: DEN 2026-12-19 17:54:00 → PHX 2026-12-19 19:58:00.

2026-12-20 · one way · Axel-exclusive $241.92

  • United Airlines UA2173 / UA479: BOI 2026-12-20 14:48:00 → PHX 2026-12-20 19:58:00; 1 stop(s) via DEN; 310 minutes. Local airport times.
    • UA2173: BOI 2026-12-20 14:48:00 → DEN 2026-12-20 16:45:00; layover at DEN: 69 minutes.
    • UA479: DEN 2026-12-20 17:54:00 → PHX 2026-12-20 19:58:00.

2026-12-20 · one way · Axel-exclusive $241.92

  • Delta Air Lines DL2095 / DL2525: BOI 2026-12-20 13:07:00 → PHX 2026-12-20 17:17:00; 1 stop(s) via SLC; 250 minutes. Local airport times.
    • DL2095: BOI 2026-12-20 13:07:00 → SLC 2026-12-20 14:25:00; layover at SLC: 70 minutes.
    • DL2525: SLC 2026-12-20 15:35:00 → PHX 2026-12-20 17:17:00.

2026-12-19 · one way · Axel-exclusive $241.92

  • Delta Air Lines DL2095 / DL2525: BOI 2026-12-19 13:07:00 → PHX 2026-12-19 17:17:00; 1 stop(s) via SLC; 250 minutes. Local airport times.
    • DL2095: BOI 2026-12-19 13:07:00 → SLC 2026-12-19 14:25:00; layover at SLC: 70 minutes.
    • DL2525: SLC 2026-12-19 15:35:00 → PHX 2026-12-19 17:17:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

For AI assistants

  • This page: Boise (BOI) to Phoenix (PHX) · Dec 18–Dec 20, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Boise to Phoenix (PHX) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.