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

The cheapest airlines for a one-way flight from Boston to Illinois are United Airlines ($64), Southwest ($68), and JetBlue ($69).

What are the most popular routes from Boston to Illinois?

The most popular flight routes from Boston to Illinois are Boston Logan Intl - Chicago O'Hare Intl, Boston Logan Intl - Chicago Midway and Boston Logan Intl - Lambert-St Louis.

What are the cheapest flights from Boston to Illinois?

While on average a flight from Boston to Illinois is generally $596, our data shows the cheapest flight currently is $57. When looking at the most popular route, (Boston Logan Intl - Chicago O'Hare Intl), you can expect to pay $110 for that flight.

What are the most reliable airlines from Boston to Illinois?

No one likes to see their flight delayed. When booking a flight from Boston to Illinois consider choosing LATAM Airlines (100%), KLM (94%) or WestJet (91%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Boston to Illinois?

When booking a flight from Boston to Illinois, you may want to consider flying on American Airlines, JetBlue or Delta as they are the most popular for this route.

How far in advance should I book a flight from Boston to Illinois?

Travelers have found it’s best to book a flight 50 days in advance to save up to 69% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 50 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Boston to Illinois 1-2 weeks in advance for as low as $209, or $357 for flights within the next 24 hours.

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

The best pricing can be found in the month of September. Prices to Illinois from Boston average $240. You can even find prices in September for less than $240, as users have found deals to Illinois from as low as $60. The month of May appears to be one of the more expensive times to travel to Illinois from Boston. Flying in the targeted month can save you up to 18%.

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

If you book a flight to Illinois from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston.

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

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

How can I find direct flights from Boston to Illinois?

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

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

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

$64+ Flights from Boston to Illinois

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Cheap flight deals from Boston to Illinois

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$123 (United Airlines)
One-way from	$64 (United Airlines)
Popular in	May
Cheapest in	September
Average price	$268
Good round-trip deal	$203 or less
Good one-way deal	$115 or less

Provider with most accurate pricing for Boston Logan Intl-Chicago (CHI) flight deals.

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Provider most trusted by Cheapflights users for Boston Logan Intl-Chicago (CHI) flights.

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From Boston Logan Intl to Illinois

Search Deals

One-way flight from Boston Logan Intl to Illinois

Search Deals

Highest demand for flights based on searches. 9% potential increase in price ($26 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Price to beat on a round-trip flight from Boston Logan Intl to Illinois.

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Price to beat on a one-way flight from Boston Logan Intl to Illinois.

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Find flight deals from Boston to Illinois

Cheapest flights from Boston to Illinois
Explore the most affordable flight options available from Boston to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Tue 7/16:59 pmBOS - ORD

1 stop5h 38mUnited Airlines

Thu 7/316:00 amORD - BOS

Nonstop2h 26mUnited Airlines

Deal found 4/10

$123

Thu 5/15:45 amBOS - MDW

Nonstop2h 35mSouthwest

Mon 5/52:40 pmMDW - BOS

1 stop7h 35mSouthwest

Deal found 4/10

$127

Wed 5/74:30 pmBOS - ORD

Nonstop3h 06mJetBlue

Sat 5/106:10 amORD - BOS

1 stop4h 32mJetBlue

Deal found 4/10

$127

Tue 5/62:12 pmBOS - ORD

1 stop11h 08mSpirit Airlines

Sat 5/1012:41 pmORD - BOS

1 stop9h 48mSpirit Airlines

Deal found 4/10

$131

Sat 6/76:45 amBOS - ORD

1 stop9h 15mSouthwest

Wed 6/114:00 pmORD - BOS

1 stop6h 55mSouthwest

Deal found 4/10

$136

Sat 5/316:35 amBOS - ORD

Nonstop2h 56mAmerican Airlines

Thu 6/56:45 amORD - BOS

Nonstop2h 23mAmerican Airlines

Deal found 4/10

$149

Tue 6/104:05 pmBOS - ORD

Nonstop2h 59mDelta

Fri 6/136:59 pmORD - BOS

Nonstop2h 46mDelta

Deal found 4/10

$157

Tue 5/133:49 pmBOS - ORD

1 stop8h 15mMultiple Airlines

Fri 5/164:15 pmORD - BOS

1 stop7h 29mMultiple Airlines

Deal found 4/10

$159

Tue 4/156:00 amBOS - MDW

1 stop11h 08mFrontier

Wed 4/163:00 pmMDW - BOS

1 stop19h 50mFrontier

Deal found 4/10

$180

Sat 4/125:45 amBOS - ORD

1 stop9h 13mFrontier

Tue 4/159:32 amORD - BOS

1 stop13h 53mFrontier

Deal found 4/10

$198

Fri 7/1111:42 amBOS - RFD

1 stop23h 31mMultiple Airlines

Sun 7/139:21 amRFD - BOS

1 stop24h 18mMultiple Airlines

Deal found 4/10

$233

Thu 5/2211:31 amBOS - MDW

1 stop25h 54mAllegiant Air

Mon 5/262:54 pmMDW - BOS

1 stop17h 20mAllegiant Air

Deal found 4/10

$244

Best flights from Boston to Illinois
Discover carefully curated flight deals from Boston to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 11, 2025.

Tue 7/16:59 pmBOS - ORD

1 stop5h 38mUnited Airlines

Thu 7/316:00 amORD - BOS

Nonstop2h 26mUnited Airlines

Deal found 4/10

$123

Thu 5/15:45 amBOS - MDW

Nonstop2h 35mSouthwest

Mon 5/52:40 pmMDW - BOS

1 stop7h 35mSouthwest

Deal found 4/10

$127

Wed 5/78:00 amBOS - ORD

Nonstop3h 02mJetBlue

Sat 5/106:10 amORD - BOS

1 stop4h 32mJetBlue

Deal found 4/10

$127

Tue 5/62:12 pmBOS - ORD

1 stop11h 08mSpirit Airlines

Sat 5/1012:41 pmORD - BOS

1 stop9h 48mSpirit Airlines

Deal found 4/10

$131

Sat 6/710:56 amBOS - ORD

Nonstop2h 52mAmerican Airlines

Wed 6/118:40 pmORD - BOS

Nonstop2h 40mAmerican Airlines

Deal found 4/9

$149

Mon 5/54:20 pmBOS - ORD

Nonstop3h 01mDelta

Tue 5/1310:05 amORD - BOS

Nonstop2h 29mDelta

Deal found 4/9

$167

Thu 4/246:00 amBOS - ORD

1 stop18h 39mMultiple Airlines

Wed 4/307:47 pmORD - BOS

1 stop13h 35mMultiple Airlines

Deal found 4/10

$170

Tue 4/156:00 amBOS - MDW

1 stop11h 08mFrontier

Wed 4/163:00 pmMDW - BOS

1 stop19h 50mFrontier

Deal found 4/10

$180

Thu 5/2211:31 amBOS - MDW

1 stop25h 54mAllegiant Air

Mon 5/262:54 pmMDW - BOS

1 stop17h 20mAllegiant Air

Deal found 4/10

$244

Sat 6/76:45 amBOS - ORD

1 stop9h 15mSouthwest

Wed 6/114:00 pmORD - BOS

1 stop6h 55mSouthwest

Deal found 4/9

$136

Mon 4/1410:25 amBOS - ORD

1 stop14h 58mFrontier

Tue 4/159:44 amORD - BOS

1 stop14h 03mFrontier

Deal found 4/10

$198

Thu 5/16:00 amBOS - STL

1 stop9h 46mSouthern / Mokulele

Mon 5/512:15 pmSTL - BOS

2 stops9h 31mSouthern / Mokulele

Deal found 4/10

$435

Last-minute flights from Boston to Illinois
Discover last-minute flight deals from Boston to Illinois. Data last updated April 11, 2025 and is based on user searches.

Sat 4/125:45 amBOS - ORD

1 stop9h 13mFrontier

Tue 4/159:32 amORD - BOS

1 stop13h 53mFrontier

Deal found 4/10

$198

Tue 4/156:00 amBOS - ORD

1 stop14h 04mFrontier

Wed 4/162:00 pmORD - BOS

1 stop9h 30mFrontier

Deal found 4/10

$200

Tue 4/156:00 amBOS - ORD

1 stop29h 40mMultiple Airlines

Tue 5/69:30 amORD - BOS

1 stop12h 28mMultiple Airlines

Deal found 4/10

$223

Tue 4/156:00 amBOS - MDW

1 stop11h 08mFrontier

Wed 4/163:00 pmMDW - BOS

1 stop19h 50mFrontier

Deal found 4/10

$180

Wed 4/166:00 amBOS - MDW

1 stop14h 35mFrontier

Thu 4/175:15 amMDW - BOS

1 stop27h 20mFrontier

Deal found 4/10

$210

Wed 4/167:48 pmBOS - ORD

2 stops23h 39mSpirit Airlines

Mon 4/218:45 amORD - BOS

1 stop10h 59mSpirit Airlines

Deal found 4/9

$279

Wed 4/167:48 pmBOS - STL

2 stops23h 53mMultiple Airlines

Fri 4/189:50 amSTL - BOS

2 stops7h 53mMultiple Airlines

Deal found 4/10

$359

Thu 4/175:30 amBOS - ORD

1 stop4h 51mDelta

Tue 4/227:00 amORD - BOS

Nonstop2h 26mDelta

Deal found 4/10

$217

Thu 4/176:00 amBOS - ORD

Nonstop2h 57mUnited Airlines

Sun 4/209:31 pmORD - BOS

Nonstop2h 28mUnited Airlines

Deal found 4/10

$315

Thu 4/175:30 amBOS - MDW

1 stop4h 10mDelta

Mon 4/216:45 pmMDW - BOS

1 stop5h 22mDelta

Deal found 4/10

$317

Sat 4/195:15 pmBOS - ORD

Nonstop3h 12mJetBlue

Mon 4/218:29 pmORD - BOS

Nonstop2h 29mJetBlue

Deal found 4/10

$268

Sun 4/205:30 amBOS - ORD

1 stop8h 15mSouthwest

Tue 4/224:00 pmORD - BOS

1 stop5h 05mSouthwest

Deal found 4/10

$136

One-way flights from Boston to Illinois
Search for one-way flight options from Boston to Illinois. Find affordable one-way fares based on user searches. Data last updated April 11, 2025.

Tue 7/16:59 pmBOS - ORD

1 stop5h 38mUnited Airlines

Deal found 4/10

$64

Thu 4/241:15 pmBOS - MDW

1 stop8h 05mSouthwest

Deal found 4/10

$68

Sun 5/115:45 amBOS - ORD

1 stop7h 05mSouthwest

Deal found 4/10

$68

Fri 5/95:30 pmBOS - ORD

1 stop5h 24mJetBlue

Deal found 4/10

$69

Wed 6/117:20 amBOS - ORD

Nonstop2h 58mDelta

Deal found 4/10

$71

Thu 5/156:00 amBOS - ORD

1 stop4h 24mSpirit Airlines

Deal found 4/10

$85

Fri 4/258:59 pmBOS - ORD

Nonstop2h 58mAmerican Airlines

Deal found 4/10

$89

Tue 4/156:00 amBOS - MDW

1 stop11h 08mFrontier

Deal found 4/10

$95

Sat 5/249:49 amBOS - ORD

1 stop10h 59mFrontier

Deal found 4/10

$95

Sun 6/811:31 amBOS - MDW

1 stop20h 44mAllegiant Air

Deal found 4/10

$100

Fri 5/3011:41 amBOS - RFD

1 stop22h 43mAllegiant Air

Deal found 4/11

$111

Wed 6/116:10 amBOS - RFD

2 stops34h 06mMultiple Airlines

Deal found 4/10

$122

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Tue 7/1

6:59 pm-11:37 pm

1 stop5h 38m

Chicago O'Hare Intl

Thu 7/31

6:00 am-9:26 am

Nonstop2h 26m

$123

BostonChicago

BOS - MDW

BOSMDW

Boston Logan Intl

Thu 5/1

5:45 am-7:20 am

Nonstop2h 35m

Chicago Midway

Mon 5/5

2:40 pm-11:15 pm

1 stop7h 35m

$127

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Wed 5/7

4:30 pm-6:36 pm

Nonstop3h 06m

Chicago O'Hare Intl

Sat 5/10

6:10 am-11:42 am

1 stop4h 32m

$127

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Tue 5/6

2:12 pm-12:20 am

1 stop11h 08m

Chicago O'Hare Intl

Sat 5/10

12:41 pm-11:29 pm

1 stop9h 48m

$131

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Sat 6/7

6:45 am-3:00 pm

1 stop9h 15m

Chicago O'Hare Intl

Wed 6/11

4:00 pm-11:55 pm

1 stop6h 55m

$136

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Sat 5/31

6:35 am-8:31 am

Nonstop2h 56m

Chicago O'Hare Intl

Thu 6/5

6:45 am-10:08 am

Nonstop2h 23m

$149

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Tue 6/10

4:05 pm-6:04 pm

Nonstop2h 59m

Chicago O'Hare Intl

Fri 6/13

6:59 pm-10:45 pm

Nonstop2h 46m

$157

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Tue 5/13

3:49 pm-11:04 pm

1 stop8h 15m

Chicago O'Hare Intl

Fri 5/16

4:15 pm-12:44 am

1 stop7h 29m

$159

BostonChicago

BOS - MDW

BOSMDW

Boston Logan Intl

Wed 5/7

8:00 am-12:24 pm

1 stop29h 24m

Chicago Midway

Fri 5/9

1:19 pm-12:44 am

1 stop10h 25m

$190

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Mon 4/14

10:25 am-12:23 am

1 stop14h 58m

Chicago O'Hare Intl

Tue 4/15

9:44 am-12:47 am

1 stop14h 03m

$198

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 60 results

...

Best time to book a flight from Boston to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Boston 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 Boston to Illinois

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

Currently, August is the cheapest month in which you can book a flight from Boston to Illinois (average of $245). Flying from Boston to Illinois in March is currently the most expensive (average of $321). 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 BOS to IL?

When flying from Boston to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Boston to Illinois

The most flights from BOS to USIL are scheduled on a Friday (60 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Rainfall in Illinois by month

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Boston to Illinois by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,851 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,279 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,910 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,636 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

JetBlue

7.3

Good

2,925 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

What airport do you fly from for flights from Boston to Illinois?
If you book a flight to Illinois from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston.
What are the cheapest airlines to fly from Boston to Illinois one-way?
The cheapest airlines for a one-way flight from Boston to Illinois are United Airlines ($64), Southwest ($68), and JetBlue ($69).
What are the most popular routes from Boston to Illinois?
The most popular flight routes from Boston to Illinois are Boston Logan Intl - Chicago O'Hare Intl, Boston Logan Intl - Chicago Midway and Boston Logan Intl - Lambert-St Louis.
What are the most reliable airlines from Boston to Illinois?
No one likes to see their flight delayed. When booking a flight from Boston to Illinois consider choosing LATAM Airlines (100%), KLM (94%) or WestJet (91%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Boston to Illinois?
While on average a flight from Boston to Illinois is generally $596, our data shows the cheapest flight currently is $57. When looking at the most popular route, (Boston Logan Intl - Chicago O'Hare Intl), you can expect to pay $110 for that flight.
Can I find deals for flights from Boston to Illinois that include hotel bookings?
Yes. In addition to deals on Boston to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Boston to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Illinois.
Can I find deals for business class flights from Boston to Illinois?
Yes. Cheapflights offers flight deals from Boston to Illinois 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 Boston to Illinois?
Currently, August is the cheapest month in which you can book a flight from Boston to Illinois (average of $245). Flying from Boston to Illinois in March is currently the most expensive (average of $321). 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

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Boston to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$39	Average$104	FlexibilityNo cancel fee	On-time65%
JetBlue	Cheapest$84	Average$227	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$94	Average$325	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$97	Average$501	FlexibilityNo cancel fee	On-time69%
Frontier	Cheapest$99	Average$151	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$140	Average$475	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$143	Average$305	FlexibilityNo cancel fee	On-time63%

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$64+ Cheap flights from Boston (BOS) to Illinois

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 7/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Boston to Illinois with Cheapflights

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Cheap flight deals from Boston to Illinois

Keep the following information in mind while searching for Boston to Illinois flight deals. Data was last updated April 11, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Boston to Illinois

Cheapest flights from Boston to IllinoisExplore the most affordable flight options available from Boston to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Explore the most affordable flight options available from Boston to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to Illinois that are best for you.

Best time to book a flight from Boston to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Boston with our price prediction graph.

Cheapflights Insights

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

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

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

Find hourly flight availability from Boston to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 11, 2025.

Weekly flight availability from Boston to Illinois

Explore weekly flight availability from Boston to Illinois. 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 April 11, 2025.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

Reviews of airlines servicing Illinois

Related info for your journey

Find useful and relevant information for your journey from Boston to Illinois. 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 from for flights from Boston to Illinois?

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

What are the most popular routes from Boston to Illinois?

What are the most reliable airlines from Boston to Illinois?

What are the cheapest flights from Boston to Illinois?

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

How can I find direct flights from Boston to Illinois?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Boston to Illinois

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Cheapest flights from Boston to Illinois
Explore the most affordable flight options available from Boston to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.