For quick check-in, locate your airline’s counter in the main terminal; they are arranged like an island with desks on both sides.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $141 (Kiwi.com) |
One-way from | $64 (United Airlines) |
Popular in | March |
Cheapest in | October |
Average price | $320 |
Good round-trip deal | $334 or less |
Good one-way deal | $209 or less |
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.Chicago
IAD - MDW
IADMDW
Washington, D.C. Dulles Intl
Thu 1/8
6:00 am-11:31 am
1 stop6h 31m
Chicago Midway
Sun 1/11
9:15 am-8:56 pm
1 stop10h 41m
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Fri 1/16
10:28 pm-11:39 pm
Nonstop2h 11m
Chicago O'Hare Intl
Sun 1/18
8:52 am-11:46 am
Nonstop1h 54m
Washington, D.C.Chicago
IAD - MDW
IADMDW
Washington, D.C. Dulles Intl
Fri 1/16
10:08 pm-7:27 am
1 stop10h 19m
Chicago Midway
Mon 1/19
8:28 am-9:13 pm
1 stop11h 45m
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Wed 12/24
5:31 pm-6:52 pm
Nonstop2h 21m
Chicago O'Hare Intl
Tue 1/6
2:35 pm-5:35 pm
Nonstop2h 00m
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Thu 2/26
10:30 pm-11:43 pm
Nonstop2h 13m
Chicago O'Hare Intl
Mon 3/2
1:02 pm-4:05 pm
Nonstop2h 03m
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Wed 1/21
1:05 pm-2:25 pm
Nonstop2h 20m
Chicago O'Hare Intl
Mon 1/26
1:00 pm-4:00 pm
Nonstop2h 00m
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Thu 1/8
10:28 pm-11:39 pm
Nonstop2h 11m
Chicago O'Hare Intl
Mon 1/12
8:52 am-11:46 am
Nonstop1h 54m
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Thu 1/29
6:00 am-10:05 am
1 stop5h 05m
Chicago O'Hare Intl
Mon 2/2
10:35 am-4:46 pm
1 stop5h 11m
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Wed 1/21
7:00 am-11:47 am
1 stop5h 47m
Chicago O'Hare Intl
Mon 1/26
5:35 pm-11:06 pm
1 stop4h 31m
Washington, D.C.Chicago
IAD - ORD
IADORD
Washington, D.C. Dulles Intl
Sat 2/28
5:11 pm-8:44 pm
1 stop4h 33m
Chicago O'Hare Intl
Tue 3/3
5:37 pm-11:09 pm
1 stop4h 32m
| 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 Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star |
Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Chicago (average of $122). Flying from Washington, D.C. Dulles Intl Airport to Chicago in January is currently the most expensive (average of $209). 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.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 32% on flights from Washington, D.C. Dulles Intl Airport to Chicago by exploring options for tickets in the evening.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Chicago flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from IAD to CHI are scheduled on a Thursday (20 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (14 on average).
Boarding
Food
Entertainment
Crew
Comfort
Overall
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Food
Entertainment
Crew
Comfort
Overall
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Food
Entertainment
Crew
Comfort
Overall
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Food
Entertainment
Crew
Comfort
Overall
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$122 | Average$196 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$207 | Average$331 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$234 | Average$327 | FlexibilityNo cancel fee | On-timeN/A |