Ontario to Phoenix ONT → PHX
Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX)
The cheapest return found recently is $102 with Southwest Airlines, 4 Dec – 15 Dec, found 4 days ago. The cheapest one-way found recently is $73 with Frontier Airlines, 21 Nov, found 2 days ago.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$102
4 Dec – 15 Dec · Southwest Airlines
Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX)
Leaves 5:55 a.m. · Return leaves 1:12 p.m. · 2 h 50 min of travel, both ways together
out nonstop, back nonstop
found 4 days ago
Cheapest nonstop return
$102
4 Dec – 15 Dec · Southwest Airlines
Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX)
Leaves 5:55 a.m. · Return leaves 1:12 p.m. · 2 h 50 min of travel, both ways together
out nonstop, back nonstop
found 4 days ago
Found recently, and the cheapest we hold
$102 4 Dec – 15 Decfound 4 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 $96 to $217.
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?
Not enough comparable prices yet: we hold return fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 11-night return fares leaving within 3 days of 4 Dec to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 4 Dec – 15 Dec | $102 | Southwest Airlines | Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
Airlines on the cheapest dates: Southwest Airlines.
One-way
The cheapest one-way fare on each of 6 departure dates is usually $89 to $100.
Cheapest one-way found recently
$73
21 Nov · Frontier Airlines
Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX)
Leaves 2:01 p.m. · 3 h 48 min trip
1 stop
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$73 21 Novfound 2 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $52 to $60.
At $73, the cheapest one-way found recently is above that range.
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 one-way price?
Compared with the cheapest one-way fare on each of 6 departure dates from 2 Nov to 6 Jan 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 one-way fares leaving within 3 days of 21 Nov to compare.
Every date we hold
6 fares on 6 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 2 Nov | $103 | Frontier Airlines | Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX) | 1 stop | found 4 days ago | Open this trip |
| 7 Nov | $108 | Frontier Airlines | Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX) | 1 stop | found 2 days ago | Open this trip |
| 21 Nov | $73 | Frontier Airlines | Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX) | 1 stop | found 2 days ago | Open this trip |
| 15 Dec | $89 | Frontier Airlines | Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX) | 1 stop | found 3 days ago | Open this trip |
| 16 Dec | $89 | Frontier Airlines | Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX) | 1 stop | found 3 days ago | Open this trip |
| 6 Jan 2027 | $92 | Frontier Airlines | Ontario International Airport (ONT) → Phoenix Sky Harbor International Airport (PHX) | 1 stop | found 2 days ago | Open this trip |
Which month looks cheapest?
November 2026 is the cheapest month — from $73.
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Ontario 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 4 Dec – 15 Dec in another cabin: Premium economy · Business · First
Today's prices for 21 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Phoenix?
Return
Fares 14 to 29 days before departure were typically 66% 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 | $289 | $217 | +198% | 15 |
| 7–13 days | $248 | $217 | +156% | 11 |
| 14–29 days | $97 | $96 | Cheapest seen | 11 |
| 30–59 days | $115 | $102 | +19% | 22 |
| 180+ days | $261 | $261 | +169% | 7 |
One-way
The cheapest fares were 30 to 59 days before departure.
From the cheapest one-way 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 |
|---|---|---|---|---|
| 14–29 days | $58 | $52 | +4% | 23 |
| 30–59 days | $56 | $52 | Cheapest seen | 25 |
| 60–89 days | $62 | $59 | +11% | 15 |
| 90–179 days | $64 | $58 | +14% | 18 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Phoenix
56 km from Ontario
$243
$141 more than flying from Ontario
24 Oct – 27 Oct · LAX → PHX · out 1 stop, back 1 stop
found 2 days ago
Long Beach → Phoenix
60 km from Ontario
$398
$296 more than flying from Ontario
24 Oct – 27 Oct · LGB → PHX · out nonstop, back nonstop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Phoenix
56 km from Ontario
$94
$21 more than flying from Ontario
20 Oct · LAX → PHX · nonstop
found today
Long Beach → Phoenix
60 km from Ontario
$147
$74 more than flying from Ontario
20 Nov · LGB → PHX · nonstop
found yesterday
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 4 Dec – 15 Dec. 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