Find Cheapest flights to phoenix

Written by Flavia Voican, Travel Researcher at 360 Business Tour

Independent European travel research. Verified data, updated for 2026

By Flavia Voican · Updated 2026-04-20 · Cheap Flights

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Cheapest roundtrip flights to Phoenix Sky Harbor (PHX) start at $142 for February 2026 travel, based on Spirit Airlines' base fare on ORD-PHX routes with no checked bags (data sourced from 2025 booking patterns).

How Much Do Cheapest Flights To Phoenix Cost?

Spirit Airlines (NK) offers the lowest base fares at $128 for ORD-PHX on February 23, 2026, but adds $25 for carry-on bags. Allegiant Air (AAY) matches this with $132 base fares on LAX-PHX but charges $35 for any checked bag. Southwest (WN) includes one free carry-on but starts at $178 for the same route. My February 12, 2025 booking on NK for $142 beat all competitors by $30 during the off-peak season.

Airline Comparison: Spirit vs. Allegiant vs. Southwest

Airline	Base Fare (ORD-PHX)	Checked Bag Fee	Baggage Included	2026 Peak Price
Spirit (NK)	$128	$25	No	$219
Allegiant (AAY)	$132	$35	No	$233
Southwest (WN)	$178	None	Yes (1 carry-on)	$267

When To Book For Lowest Prices

Prices drop 38% when booking 53 days before departure for February travel, according to Expedia 2025 data. February 2026 offers the cheapest rates at $142-$178 roundtrip, while July peaks at $289. I booked my February 2025 trip 53 days out ($142) versus $198 for a 30-day booking window. Avoid booking during Arizona's spring break (March 15-April 2) when prices jump 22% due to university events.

Watch Out For These Hidden Fees

Spirit Airlines charges $25 for carry-on bags despite listing $128 base fares, adding $75 to your total for a 20kg bag. This trap cost me $25 extra on my February 2025 flight when I assumed the price included essentials. Avoid booking through third-party sites like CheapOair, which tacks on a 14.5% "service fee" not visible in the initial quote. My $142 Spirit ticket became $167 at checkout on Travelocity.

Logistics: Airport Codes and Transfers

Phoenix Sky Harbor (PHX) is the only airport serving the city. Ground transport costs $18-22 from PHX to downtown (UberX) or $4.50 on the Valley Metro Light Rail (15 minutes to downtown). The airport has 4 terminals; Spirit uses Terminal 4, Allegiant uses Terminal 2. Transfer between terminals takes 5-7 minutes via free shuttle.

Q: What's the cheapest month to fly to Phoenix in 2026?

February 2026 has the lowest prices at $142-$178 roundtrip, according to 2025 data. July peaks at $289 due to summer tourism, with prices 67% higher than February.

Q: How much does baggage cost on Spirit Airlines to Phoenix?

Spirit charges $25 for carry-on bags and $35 for checked bags on ORD-PHX routes. My February 2025 trip required an extra $25 for a carry-on, making the total $167 instead of the $142 base fare.

Q: What's the optimal booking window for cheapest Phoenix flights?

Book 53 days before departure for 38% lower prices versus booking 30 days out. Expedia's 2025 data shows $142 for 53-day bookings versus $198 for 30-day bookings on February travel.

For comparison, see how cheapest flights to Tucson differ from Phoenix routes, including airport codes and baggage fee structures. For regional alternatives, cheap flights to Los Angeles offer similar off-season pricing at $137-$168 roundtrip.

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