Flights To Phx — Compare & Book

By Flavia Voican · Updated 2026-04-19 · General Flights

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Flights from SFO to PHX average $112 one-way in March 2026, according to Bureau of Transportation Statistics data. Southwest Airlines (WN) offers the lowest base fare at $98 for non-stop service, while Delta (DL) charges $142 for a 1 hour 45 minute flight with checked baggage fees.

How Much Do Flights To PHX Cost in 2026?

Southwest (WN) dominates the SFO-PHX route with $98 base fares, including one carry-on bag. Delta (DL) is the most expensive at $142 for a 1h45m flight but includes a free checked bag. American Airlines (AA) offers $129 seats with 30% higher fuel surcharges than Southwest. My March 2025 trip from SFO to PHX on Southwest cost $142 roundtrip with $50 for a second checked bag during peak season.

Airline Comparison: Price, Time & Baggage

Airline	IATA	Base Fare (SFO-PHX)	Duration	Checked Bag Fee
Southwest Airlines	WN	$98	1h45m	Free (1st bag)
Delta Air Lines	DL	$142	1h45m	$35 (1st bag)
American Airlines	AA	$129	2h10m	$40 (1st bag)

Best Time to Book & Cheapest Months

Book SFO-PHX flights 56 days before departure for the lowest fares, per 2025 airline data. March 2026 is 22% cheaper than July peak season ($98 vs $126). September shows the lowest demand with average prices at $105, while December surges to $168. Avoid booking on Thursdays—prices rise 18% due to business travel patterns.

Watch Out For These Hidden Fees

Delta’s $35 first checked bag fee isn't included in the $142 base fare, adding $128 to the total price for a family of three. Booking through Delta’s mobile app adds a $7.50 "convenience fee" not shown during search. I discovered this when comparing a $142 Delta booking on their site versus $135 on Kayak, where the fee was excluded.

PHX Airport Logistics & Transport

Phoenix Sky Harbor (PHX) is 6 miles from downtown. The Valley Metro bus (Route 20) costs $2.50 and takes 35 minutes to reach Chase Field. UberX from PHX to downtown averages $18-$22. The airport has two terminals (Terminal 1 and 4), but all SFO-PHX flights use Terminal 4. Arrive 90 minutes early for domestic flights during peak hours (7-9 AM).

Q: What's the cheapest airline for SFO-PHX in March 2026?

A: Southwest (WN) offers $98 base fares for non-stop flights, 31% cheaper than Delta’s $142 average. This price includes one carry-on bag and no change fees.

Q: When do PHX flight prices drop most dramatically?

A: Prices drop 22% in March compared to July, with average fares falling from $126 to $98. The best booking window is 56 days prior to departure.

Q: How much does checked baggage cost on Delta to PHX?

A: Delta charges $35 for the first checked bag on SFO-PHX routes. This fee isn't included in the $142 base fare, making the total $177 for a single bag.

Explore flights to LAX for similar route comparisons, including SFO-LAX price data and seasonal trends. For Phoenix business travel tips, see our Phoenix business travel guide.

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