Use the FlyLogan App for real-time flight updates and pre-order food through BOS2GO to save time at the airport.

Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $127 (Southwest) |
One-way from | $64 (Southwest) |
Popular in | April |
Cheapest in | September |
Average price | $257 |
Good round-trip deal | $254 or less |
Good one-way deal | $137 or less |
Fly from
Fly to
Route
Depart
Return
Price
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Tue 1/20
3:35 pm-5:43 pm
Nonstop3h 08m
Chicago O'Hare Intl
Fri 1/23
7:45 am-11:10 am
Nonstop2h 25m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Sun 1/18
7:30 am-9:41 am
Nonstop3h 11m
Chicago O'Hare Intl
Fri 1/30
10:40 am-2:13 pm
Nonstop2h 33m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Wed 1/21
3:35 pm-5:43 pm
Nonstop3h 08m
Chicago O'Hare Intl
Fri 1/23
7:45 am-11:10 am
Nonstop2h 25m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Fri 1/23
8:25 pm-10:29 pm
Nonstop3h 04m
Chicago O'Hare Intl
Wed 1/28
10:40 am-2:13 pm
Nonstop2h 33m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Sat 2/21
7:00 am-9:10 am
Nonstop3h 10m
Chicago O'Hare Intl
Tue 2/24
10:00 am-1:20 pm
Nonstop2h 20m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Sun 1/18
5:15 pm-7:26 pm
Nonstop3h 11m
Chicago O'Hare Intl
Thu 1/29
7:05 am-10:40 am
Nonstop2h 35m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Sun 1/18
7:30 am-9:41 am
Nonstop3h 11m
Chicago O'Hare Intl
Wed 1/28
2:25 pm-5:54 pm
Nonstop2h 29m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Wed 1/21
3:35 pm-5:43 pm
Nonstop3h 08m
Chicago O'Hare Intl
Thu 1/22
7:45 am-11:10 am
Nonstop2h 25m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Sat 1/17
5:15 pm-7:26 pm
Nonstop3h 11m
Chicago O'Hare Intl
Wed 1/28
7:05 am-10:40 am
Nonstop2h 35m
BostonChicago
BOS - ORD
BOSORD
Boston Logan Intl
Sat 1/17
5:15 pm-7:26 pm
Nonstop3h 11m
Chicago O'Hare Intl
Fri 1/30
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*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
The best time to book flights from Boston to Chicago is 90 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, April is the cheapest month in which you can book a flight from Boston to Chicago (average of $89). Flying from Boston to Chicago in January is currently the most expensive (average of $123). 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 21% on flights from Boston to Chicago by exploring options for tickets in the evening.
Travelers seeking maximum savings on their Boston to Chicago flight should consider departing on Thursday mornings 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.
The most flights from BOS to CHI are scheduled on a Friday (63 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (34 on average).
Tampa (TPA) – chosen by Cheapflights users on 67% of 1-stop itineraries from Boston to Chicago on Cheapflights.
Tampa (TPA) is the most affordable 1-stop option, with an average round-trip price of $126.
Flights via Fort Lauderdale (FLL) have the shortest average one-way travel time for 1-stop routes: 10h 26m.
Flights via Fort Lauderdale (FLL) offer the fastest connection on this route, with an average layover time of 6h 16m.
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.
Food
Boarding
Entertainment
Crew
Overall
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Entertainment
Crew
Overall
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Entertainment
Crew
Overall
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Entertainment
Crew
Overall
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Entertainment
Crew
Overall
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Food
Boarding
Entertainment
Crew
Overall
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$75 | Average$188 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$83 | Average$308 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$114 | Average$288 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$217 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$123 | Average$270 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$129 | Average$256 | FlexibilityNo cancel fee | On-time71% |