United's Economy Plus offers extra legroom and priority boarding, enhancing comfort on domestic flights.
Prepay for checked bags on United to save money. Avoid fees by using MileagePlus Premier benefits.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $129 (Delta) |
One-way from | $68 (Southwest) |
Popular in | April |
Cheapest in | September |
Average price | $218 |
Good round-trip deal | $252 or less |
Good one-way deal | $150 or less |
Fly from
Fly to
Route
Depart
Return
Price
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Mon 2/23
6:45 pm-11:56 pm
1 stop6h 11m
Chicago O'Hare Intl
Tue 2/24
2:25 pm-5:51 pm
Nonstop2h 26m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Thu 2/19
9:00 am-1:20 pm
1 stop5h 20m
Chicago O'Hare Intl
Sat 2/28
7:05 am-10:37 am
Nonstop2h 32m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Thu 1/29
4:10 pm-6:19 pm
Nonstop3h 09m
Chicago O'Hare Intl
Mon 2/2
10:35 am-3:53 pm
1 stop4h 18m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Sun 3/1
7:00 am-9:10 am
Nonstop3h 10m
Chicago O'Hare Intl
Tue 3/3
10:00 am-1:20 pm
Nonstop2h 20m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Sun 2/8
3:35 pm-5:43 pm
Nonstop3h 08m
Chicago O'Hare Intl
Tue 2/10
7:45 am-11:10 am
Nonstop2h 25m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Mon 2/23
6:45 pm-11:56 pm
1 stop6h 11m
Chicago O'Hare Intl
Wed 2/25
10:35 am-3:53 pm
1 stop4h 18m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Mon 2/16
9:45 pm-12:15 pm
2 stops15h 30m
Chicago O'Hare Intl
Wed 2/25
1:45 pm-9:45 pm
1 stop7h 00m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Tue 1/20
4:49 pm-6:49 pm
Nonstop3h 00m
Chicago O'Hare Intl
Fri 1/23
7:30 am-10:52 am
Nonstop2h 22m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Wed 1/14
1:50 pm-3:57 pm
Nonstop3h 07m
Chicago O'Hare Intl
Thu 1/15
7:05 am-10:40 am
Nonstop2h 35m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Tue 1/13
7:55 pm-10:01 pm
Nonstop3h 06m
Chicago O'Hare Intl
Thu 1/15
7:05 am-10:40 am
Nonstop2h 35m
| 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 Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
To ensure you get the cheapest price possible for a flight from Boston to Chicago O'Hare Intl Airport, you should look to book at least 66 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, April is the cheapest month in which you can book a flight from Boston to Chicago O'Hare Intl Airport (average of $89). Flying from Boston to Chicago O'Hare Intl Airport in July is currently the most expensive (average of $134). 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 Boston to Chicago O'Hare Intl Airport in the evening. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight at noon.
Travelers seeking maximum savings on their Boston to Chicago O'Hare Intl Airport flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
About 13% of weekly flights between Boston and Chicago have experienced delays in the past year, with the average delay time being 168 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Saturday tends to have the lowest number of delays on this route, whereas Thursday 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 10% of flights being delayed.
Entertainment
Boarding
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Boarding
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Boarding
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Boarding
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Boarding
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Boarding
Food
Overall
Comfort
Crew
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$73 | Average$187 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$83 | Average$162 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$114 | Average$261 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$124 | Average$269 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$128 | Average$256 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$156 | Average$164 | FlexibilityNo cancel fee | On-time63% |