Frontier's UpFront Plus seats offer a guaranteed empty middle seat for added comfort.
Frontier offers Zone 1 boarding for carry-on bag purchasers and Elite members.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $135 (Kiwi.com) |
One-way from | $79 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $249 |
Good round-trip deal | $230 or less |
Good one-way deal | $138 or less |
Fly from
Fly to
Route
Depart
Return
Price
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Wed 12/10
9:05 am-1:30 pm
Nonstop3h 25m
Chicago O'Hare Intl
Sat 12/13
3:05 pm-6:00 pm
Nonstop3h 55m
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Sun 2/22
8:35 pm-12:45 am
Nonstop3h 10m
Chicago Midway
Mon 2/23
3:25 pm-6:20 pm
Nonstop3h 55m
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Tue 12/9
5:00 am-9:15 am
Nonstop3h 15m
Chicago Midway
Fri 12/12
9:50 pm-12:35 am
Nonstop3h 45m
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Fri 1/16
10:10 pm-5:05 am
1 stop5h 55m
Chicago Midway
Mon 1/19
5:00 am-8:10 am
Nonstop4h 10m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Thu 12/11
3:38 pm-8:07 pm
Nonstop3h 29m
Chicago O'Hare Intl
Mon 12/15
11:15 am-2:15 pm
Nonstop4h 00m
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Wed 12/3
11:59 pm-9:54 am
1 stop8h 55m
Chicago Midway
Sat 12/6
9:29 am-3:05 pm
1 stop6h 36m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Sun 12/7
11:55 pm-10:00 am
1 stop9h 05m
Chicago O'Hare Intl
Wed 12/10
6:00 pm-12:16 am
1 stop7h 16m
PhoenixChicago
PHX - ORD
PHXORD
Phoenix Sky Harbor Intl
Fri 12/12
3:20 pm-9:40 pm
1 stop5h 20m
Chicago O'Hare Intl
Sat 12/13
6:00 am-2:00 pm
1 stop9h 00m
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Sun 12/7
4:35 pm-11:47 pm
1 stop6h 12m
Chicago Midway
Wed 12/10
5:29 pm-12:16 am
1 stop7h 47m
PhoenixChicago
PHX - MDW
PHXMDW
Phoenix Sky Harbor Intl
Mon 11/24
8:10 pm-12:25 am
Nonstop3h 15m
Chicago Midway
Mon 12/1
10:30 pm-1:20 am
Nonstop3h 50m
| 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 Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars |
Booking 87 days in advance of your planned departure date is, on average, the best time to get cheap flights from Phoenix Sky Harbor Intl Airport to Chicago. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Currently, December is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Chicago (average of $64). Flying from Phoenix Sky Harbor Intl Airport to Chicago in July is currently the most expensive (average of $192). 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.
One of the essential ways to save on airfare from Phoenix Sky Harbor Intl Airport to Chicago is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.
Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to Chicago flight should consider departing on Wednesday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Las Vegas (LAS) – chosen by Cheapflights users on 44% of 1-stop itineraries from Phoenix Sky Harbor Intl Airport to Chicago on Cheapflights.
Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of $128.
Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 5h 10m.
Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 0h 53m.
Overall
Food
Boarding
Entertainment
Comfort
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Reviews
Mike,Aug 2025
OKC - AUS
Overall
Food
Boarding
Entertainment
Comfort
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Overall
Food
Boarding
Entertainment
Comfort
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Overall
Food
Boarding
Entertainment
Comfort
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Overall
Food
Boarding
Entertainment
Comfort
Crew
Reviews
Mike,Aug 2025
OKC - AUS
Overall
Food
Boarding
Entertainment
Comfort
Crew
Reviews
Mike,Aug 2025
OKC - AUS
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$218 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$100 | Average$214 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$149 | Average$301 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$162 | Average$355 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$197 | Average$313 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$206 | Average$346 | FlexibilityNo cancel fee | On-time63% |