Frontier's UpFront Plus offers a guaranteed empty middle seat for extra comfort.
Early check-in helps secure your seat due to frequent overbooking.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $94 (Kiwi.com) |
One-way from | $64 (Super.com) |
Popular in | June |
Cheapest in | January |
Average price | $296 |
Good round-trip deal | $235 or less |
Good one-way deal | $124 or less |
Fly from
Fly to
Route
Depart
Return
Price
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Sat 1/17
9:05 am-1:30 pm
Nonstop3h 25m
Chicago O'Hare Intl
Sat 1/24
2:15 pm-5:20 pm
Nonstop4h 05m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Wed 1/14
10:22 am-2:55 pm
Nonstop3h 33m
Chicago O'Hare Intl
Wed 1/21
7:57 pm-10:59 pm
Nonstop4h 02m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Wed 1/21
12:28 pm-5:00 pm
Nonstop3h 32m
Chicago O'Hare Intl
Wed 1/28
7:57 pm-10:59 pm
Nonstop4h 02m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Tue 1/13
3:45 pm-11:37 pm
1 stop6h 52m
Chicago O'Hare Intl
Tue 1/20
8:00 am-5:53 pm
1 stop10h 53m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Wed 1/21
8:10 am-12:44 pm
Nonstop3h 34m
Chicago O'Hare Intl
Sun 1/25
9:25 am-12:35 pm
Nonstop4h 10m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Thu 1/22
3:45 pm-11:37 pm
1 stop6h 52m
Chicago O'Hare Intl
Sun 1/25
9:00 am-3:03 pm
1 stop7h 03m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Thu 1/22
3:45 pm-11:37 pm
1 stop6h 52m
Chicago O'Hare Intl
Fri 1/23
3:44 pm-11:22 pm
1 stop8h 38m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Tue 1/27
3:50 pm-8:24 pm
Nonstop3h 34m
Chicago O'Hare Intl
Sun 2/1
12:55 pm-3:57 pm
Nonstop4h 02m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Fri 1/23
12:59 am-10:25 am
1 stop8h 26m
Chicago O'Hare Intl
Sat 1/24
3:24 pm-9:54 pm
1 stop7h 30m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Tue 1/6
9:05 am-1:30 pm
Nonstop3h 25m
Chicago O'Hare Intl
Sat 1/10
2:15 pm-5:20 pm
Nonstop4h 05m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
The best time to book flights from Phoenix Sky Harbor Intl Airport to Chicago O'Hare Intl Airport is 39 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, January is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Chicago O'Hare Intl Airport (average of $78). Flying from Phoenix Sky Harbor Intl Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of $191). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s optimal to fly from Phoenix Sky Harbor Intl Airport to Chicago O'Hare Intl Airport in the afternoon. By choosing this option you can save up to 58% on the cost of your flight, compared to a flight at noon.
Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to Chicago O'Hare Intl Airport flight should consider departing on Friday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
About 9% of weekly flights between Phoenix and Chicago have experienced delays in the past year, with the average delay time being 159 minutes.
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Friday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, United Airlines have had the lowest number of delays on this route, with just 6% of flights being delayed.
Orlando (MCO) – chosen by Cheapflights users on 50% of 1-stop itineraries from Phoenix Sky Harbor Intl Airport to Chicago O'Hare Intl Airport on Cheapflights.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $148.
Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 12h 54m.
Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 8h 21m.
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
Thomas,Dec 2025
SEA - DEN
Boarding
Overall
Comfort
Crew
Entertainment
Food
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$208 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$81 | Average$208 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$162 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$182 | Average$322 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$189 | Average$322 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$198 | Average$307 | FlexibilityNo cancel fee | On-time71% |