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$70+ Cheap flights from Illinois to Boston (BOS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BOS
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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Cheap flight deals from Illinois to Boston

Cheapest flights from Illinois to Boston
Explore the most affordable flight options available from Illinois to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 22, 2026.

This Frontier deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:34 pm
ORD
-
BOS
1 stop7h 52m
Frontier
Wed 4/156:00 am
BOS
-
ORD
1 stop12h 00m
Frontier
Deal found 3/20$140
This Frontier deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/612:04 pm
MDW
-
BOS
1 stop12h 20m
Frontier
Wed 5/1312:01 pm
BOS
-
MDW
1 stop11h 01m
Frontier
Deal found 3/22$140
This Frontier deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:15 pm
MDW
-
BOS
1 stop10h 16m
Frontier
Mon 5/116:00 am
BOS
-
MDW
1 stop6h 09m
Frontier
Deal found 3/20$141
This Cheapflightsfares deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:50 am
ORD
-
BOS
Nonstop2h 30m
JetBlue
Sun 5/316:00 am
BOS
-
ORD
Nonstop3h 00m
JetBlue
Deal found 3/20$152
This American Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/111:11 pm
ORD
-
BOS
Nonstop2h 34m
American Airlines
Sat 4/116:48 pm
BOS
-
ORD
Nonstop3h 12m
American Airlines
Deal found 3/21$153
This SmartFares deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:58 am
ORD
-
BOS
Nonstop2h 30m
JetBlue
Sun 4/126:05 am
BOS
-
ORD
Nonstop3h 03m
JetBlue
Deal found 3/20$154
This SmartFares deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:55 am
ORD
-
BOS
Nonstop2h 30m
JetBlue
Mon 4/136:05 am
BOS
-
ORD
Nonstop3h 03m
JetBlue
Deal found 3/18$155
This American Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:56 pm
ORD
-
BOS
Nonstop2h 29m
American Airlines
Sun 5/36:30 am
BOS
-
ORD
Nonstop3h 14m
American Airlines
Deal found 3/22$156
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:59 pm
ORD
-
BOS
Nonstop2h 28m
Delta
Sun 5/36:00 am
BOS
-
ORD
Nonstop3h 09m
Delta
Deal found 3/20$157
This Southwest deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:25 am
MDW
-
BOS
Nonstop2h 15m
Southwest
Sun 4/126:10 am
BOS
-
MDW
Nonstop2h 45m
Southwest
Deal found 3/20$157
This American Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/111:11 pm
ORD
-
BOS
Nonstop2h 34m
American Airlines
Sun 4/126:30 am
BOS
-
ORD
Nonstop3h 14m
American Airlines
Deal found 3/21$158
This Priceline deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:08 pm
ORD
-
BOS
1 stop6h 23m
Multiple Airlines
Fri 5/16:52 am
BOS
-
ORD
Nonstop2h 59m
Multiple Airlines
Deal found 3/20$159

Find flight deals from Illinois to Boston

Keep the following information in mind while searching for Illinois to Boston flight deals. Data was last updated March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Frontier)

One-way from

$70
(Frontier)

Popular in

April

Cheapest in

January

Average price

$225

Good round-trip deal

$167 or less

Good one-way deal

$88 or less
Provider with most accurate pricing for Chicago (CHI)-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Boston Logan Intl flights.
Search Deals
From Illinois to Boston Logan Intl
Search Deals
One-way flight from Illinois to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Boston Logan Intl.
Search Deals
Price to beat on a one-way flight from Illinois to Boston Logan Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 22, 2026.
Use the filters below to find and compare flights from Illinois to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Wed 7/8

7:00 am-10:28 am

Nonstop2h 28m

Boston Logan Intl

Tue 7/21

11:00 am-12:52 pm

Nonstop2h 52m

$157

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Fri 5/8

9:30 pm-12:59 am

Nonstop2h 29m

Boston Logan Intl

Sun 5/10

6:00 am-8:00 am

Nonstop3h 00m

$157

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Wed 7/8

7:00 am-10:28 am

Nonstop2h 28m

Boston Logan Intl

Wed 7/22

7:00 am-8:58 am

Nonstop2h 58m

$157

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Sat 5/30

7:00 am-10:35 am

Nonstop2h 35m

Boston Logan Intl

Wed 6/3

8:40 pm-10:35 pm

Nonstop2h 55m

$157

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Tue 4/28

3:30 pm-6:58 pm

Nonstop2h 28m

Boston Logan Intl

Wed 4/29

7:35 pm-9:29 pm

Nonstop2h 54m

$157

ChicagoBoston

MDW - BOS

MDWBOS

Chicago Midway

Fri 5/8

7:00 pm-10:20 pm

Nonstop2h 20m

Boston Logan Intl

Mon 5/11

6:45 pm-10:45 pm

1 stop5h 00m

$167

ChicagoBoston

MDW - BOS

MDWBOS

Chicago Midway

Mon 4/20

5:40 pm-11:10 pm

1 stop4h 30m

Boston Logan Intl

Mon 4/27

10:40 am-12:20 pm

Nonstop2h 40m

$167

ChicagoBoston

MDW - BOS

MDWBOS

Chicago Midway

Thu 5/28

2:10 pm-11:55 pm

2 stops8h 45m

Boston Logan Intl

Sun 5/31

6:10 am-7:55 am

Nonstop2h 45m

$172

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Fri 5/8

9:30 pm-12:59 am

Nonstop2h 29m

Boston Logan Intl

Mon 5/11

7:26 pm-11:37 pm

1 stop5h 11m

$177

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Fri 5/29

2:40 pm-11:15 pm

1 stop7h 35m

Boston Logan Intl

Wed 6/3

8:10 am-12:50 pm

1 stop5h 40m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Illinois to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Boston

What is the cheapest month to book a flight from Illinois to Boston?

Currently, September is the cheapest month in which you can book a flight from Illinois to Boston (average of $91). Flying from Illinois to Boston in January is currently the most expensive (average of $117). 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.

What is the cheapest time of day to fly from IL to BOS?

Find hourly flight availability from Illinois to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 22, 2026.

When flying from Illinois to Boston, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 19% versus a flight at noon.

What is the cheapest day to fly from Illinois to Boston?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Boston. Price data was last updated on March 14, 2026.

Travelers seeking maximum savings on their Illinois to Boston flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Boston

Explore weekly flight availability from Illinois to Boston. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 22, 2026.

The most flights from USIL to BOS are scheduled on a Sunday (65 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (43 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Boston from Illinois?

    Located just 2.6 mi from the city center, Boston Logan Intl (BOS) is the airport most travelers will use when flying to Boston from Illinois.

  • How long is the flight from Illinois to Boston?

    Delta, United Airlines, and Southwest can get you from Illinois to Boston in just under 2h 20m. Your travel time will be generally consistent. The distance from Illinois to Boston is about 857 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines to fly from Illinois to Boston one-way?

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $58. JetBlue flights start at $58 while deals on American Airlines start at $58 one-way.

  • What are the most popular routes from Illinois to Boston?

    The most popular route from Illinois to Boston is Chicago O'Hare Intl - Boston Logan Intl. You may also consider Chicago Midway - Boston Logan Intl or Lambert-St Louis - Boston Logan Intl.

  • What are the most reliable airlines from Illinois to Boston?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Boston on time: JetBlue (86%), TAP AIR PORTUGAL (79%), Hawaiian Airlines (79%).

  • What are the cheapest flights from Illinois to Boston?

    The cheapest flight price from Illinois to Boston is $72. On average you can expect to pay $603. The most popular route, (Chicago O'Hare Intl - Boston Logan Intl), can usually be booked for $147.

  • Can I find deals for flights from Illinois to Boston that include hotel bookings?

    Yes. In addition to deals on Illinois to Boston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Boston.

  • Can I find deals for business class flights from Illinois to Boston?

    Yes. Cheapflights offers flight deals from Illinois to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Boston?

    Currently, September is the cheapest month in which you can book a flight from Illinois to Boston (average of $91). Flying from Illinois to Boston in January is currently the most expensive (average of $117). 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.

See more FAQs

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Medford
Cambridge
Concord
Hampton Beach
Watertown
Seekonk
Brockton
Seabrook
Cranston
Chelsea
Smithfield
Lincoln
Warwick
Peabody
Waltham
York Beach
Londonderry
Swansea
Old Orchard Beach
Quincy

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Alternative routes for Illinois to Boston

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Top 6 airlines flying from Illinois to Boston

Discover the top 6 airlines that operate flights from Illinois to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$61Average$157FlexibilityNo cancel feeOn-time62%
DeltaCheapest$87Average$216FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$91Average$158FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$117Average$359FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$117Average$399FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$124Average$243FlexibilityNo cancel feeOn-time63%

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