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 ($79), Spirit Airlines ($83), and JetBlue ($99).

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 $888, our data shows the cheapest flight currently is $78. When looking at the most popular route, (Boston Logan Intl - Chicago O'Hare Intl), you can expect to pay $97 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 WestJet (96%), Avianca (89%) or Virgin Atlantic (86%) 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 58% 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 $220, or $362 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 $244. You can even find prices in September for less than $244, 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.

$79+ Save on 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	$152 (JetBlue)
One-way from	$79 (United Airlines)
Popular in	May
Cheapest in	September
Average price	$277
Good round-trip deal	$240 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

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One-way flight from Boston Logan Intl to Illinois

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Highest demand for flights based on searches. 11% potential increase in price ($31 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

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Average for round-trip flights in March 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 March 25, 2025.

Mon 8/257:30 pmBOS - ORD

1 stop5h 12mUnited Airlines

Fri 8/299:15 pmORD - BOS

Nonstop2h 30mUnited Airlines

Deal found 3/24

$150

Wed 8/66:00 amBOS - ORD

Nonstop2h 55mJetBlue

Mon 8/116:00 amORD - BOS

1 stop4h 51mJetBlue

Deal found 3/24

$152

Fri 4/258:35 pmBOS - ORD

1 stop13h 49mSpirit Airlines

Wed 4/307:47 pmORD - BOS

1 stop13h 35mSpirit Airlines

Deal found 3/24

$155

Fri 5/24:40 pmBOS - MDW

Nonstop2h 40mSouthwest

Sun 5/46:50 amMDW - BOS

Nonstop2h 15mSouthwest

Deal found 3/24

$157

Fri 4/45:00 amBOS - ORD

Nonstop2h 55mAmerican Airlines

Wed 4/98:05 amORD - BOS

Nonstop2h 25mAmerican Airlines

Deal found 3/23

$158

Sun 4/135:45 amBOS - ORD

1 stop7h 05mSouthwest

Wed 4/161:50 pmORD - BOS

1 stop4h 20mSouthwest

Deal found 3/23

$176

Thu 5/15:10 pmBOS - ORD

Nonstop3h 04mDelta

Sun 5/47:00 amORD - BOS

Nonstop2h 26mDelta

Deal found 3/24

$197

Thu 5/155:04 pmBOS - ORD

1 stop8h 20mMultiple Airlines

Sun 5/184:15 pmORD - BOS

1 stop7h 50mMultiple Airlines

Deal found 3/24

$221

Fri 5/96:00 amBOS - MDW

1 stop7h 24mFrontier

Fri 5/161:19 pmMDW - BOS

1 stop10h 25mFrontier

Deal found 3/25

$239

Thu 5/156:00 amBOS - PIA

2 stops28h 19mMultiple Airlines

Mon 5/194:14 pmPIA - BOS

2 stops15h 55mMultiple Airlines

Deal found 3/24

$274

Thu 6/127:00 amBOS - RFD

2 stops9h 16mMultiple Airlines

Sun 6/154:06 pmRFD - BOS

1 stop18h 03mMultiple Airlines

Deal found 3/24

$277

Thu 5/2211:41 amBOS - ORD

1 stop6h 40mSun Country Air

Mon 5/269:05 pmORD - BOS

1 stop13h 50mSun Country Air

Deal found 3/24

$280

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 March 25, 2025.

Tue 4/155:15 pmBOS - ORD

Nonstop3h 12mJetBlue

Sat 4/198:29 pmORD - BOS

Nonstop2h 29mJetBlue

Deal found 3/24

$152

Thu 4/105:25 amBOS - ORD

1 stop8h 22mSpirit Airlines

Tue 4/157:47 pmORD - BOS

1 stop13h 40mSpirit Airlines

Deal found 3/23

$154

Thu 4/105:45 amBOS - MDW

Nonstop2h 35mSouthwest

Mon 4/145:30 amMDW - BOS

Nonstop2h 15mSouthwest

Deal found 3/24

$157

Fri 4/45:00 amBOS - ORD

Nonstop2h 55mAmerican Airlines

Tue 4/88:22 pmORD - BOS

Nonstop2h 37mAmerican Airlines

Deal found 3/24

$158

Thu 6/127:45 amBOS - ORD

Nonstop2h 58mUnited Airlines

Sun 6/156:30 amORD - BOS

Nonstop2h 26mUnited Airlines

Deal found 3/24

$161

Wed 5/75:04 pmBOS - ORD

1 stop8h 20mMultiple Airlines

Sun 5/114:15 pmORD - BOS

1 stop7h 50mMultiple Airlines

Deal found 3/24

$184

Thu 5/15:10 pmBOS - ORD

Nonstop3h 04mDelta

Sun 5/47:00 amORD - BOS

Nonstop2h 26mDelta

Deal found 3/24

$197

Thu 5/86:00 amBOS - MDW

1 stop7h 24mFrontier

Thu 5/151:19 pmMDW - BOS

1 stop10h 46mFrontier

Deal found 3/24

$251

Sat 4/196:30 amBOS - ORD

1 stop15h 24mSun Country Air

Thu 4/247:15 pmORD - BOS

1 stop14h 20mSun Country Air

Deal found 3/24

$275

Fri 5/309:00 amBOS - MDW

1 stop11h 14mAllegiant Air

Mon 6/27:00 pmMDW - BOS

1 stop13h 14mAllegiant Air

Deal found 3/24

$295

Sat 4/125:00 amBOS - ORD

1 stop11h 00mSouthwest

Sun 4/134:00 pmORD - BOS

1 stop7h 55mSouthwest

Deal found 3/24

$176

Thu 5/156:00 amBOS - PIA

2 stops28h 19mMultiple Airlines

Mon 5/194:14 pmPIA - BOS

2 stops15h 55mMultiple Airlines

Deal found 3/24

$274

Last-minute flights from Boston to Illinois
Discover last-minute flight deals from Boston to Illinois. Data last updated March 25, 2025 and is based on user searches.

Wed 3/266:00 amBOS - ORD

1 stop12h 26mFrontier

Sun 3/304:30 pmORD - BOS

1 stop18h 24mFrontier

Deal found 3/23

$280

Sat 3/295:20 amBOS - ORD

1 stop9h 23mFrontier

Tue 4/19:34 amORD - BOS

1 stop14h 13mFrontier

Deal found 3/23

$317

Sun 3/306:00 amBOS - STL

1 stop18h 49mFrontier

Tue 4/14:57 pmSTL - BOS

1 stop6h 50mFrontier

Deal found 3/24

$320

Mon 3/316:00 amBOS - ORD

1 stop9h 16mMultiple Airlines

Wed 4/97:47 pmORD - BOS

1 stop13h 40mMultiple Airlines

Deal found 3/24

$224

Mon 3/315:15 amBOS - PIA

2 stops10h 07mMultiple Airlines

Fri 4/49:07 pmPIA - BOS

1 stop20h 25mMultiple Airlines

Deal found 3/24

$290

Mon 3/316:00 amBOS - ORD

1 stop9h 16mMultiple Airlines

Tue 4/17:21 pmORD - BOS

1 stop13h 38mMultiple Airlines

Deal found 3/24

$231

Wed 4/25:05 pmBOS - ORD

Nonstop3h 10mJetBlue

Thu 4/38:10 pmORD - BOS

Nonstop2h 29mJetBlue

Deal found 3/24

$156

Wed 4/25:45 amBOS - MDW

Nonstop2h 50mSouthwest

Fri 4/48:35 pmMDW - BOS

Nonstop2h 15mSouthwest

Deal found 3/24

$157

Wed 4/25:20 amBOS - ORD

1 stop8h 25mSouthwest

Sat 4/54:00 pmORD - BOS

1 stop7h 15mSouthwest

Deal found 3/23

$176

Wed 4/26:13 pmBOS - ORD

1 stop15h 31mSpirit Airlines

Mon 4/78:33 pmORD - BOS

1 stop19h 41mSpirit Airlines

Deal found 3/23

$186

Wed 4/27:25 amBOS - ORD

Nonstop3h 09mDelta

Thu 4/107:05 amORD - BOS

1 stop5h 38mDelta

Deal found 3/24

$217

Wed 4/26:00 amBOS - MDW

1 stop28h 24mFrontier

Sun 4/610:19 amMDW - BOS

1 stop13h 28mFrontier

Deal found 3/25

$240

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 March 25, 2025.

Thu 4/36:00 amBOS - ORD

Nonstop2h 57mUnited Airlines

Deal found 3/25

$79

Tue 4/293:50 pmBOS - ORD

2 stops27h 27mSpirit Airlines

Deal found 3/24

$83

Wed 5/216:10 amBOS - RFD

2 stops34h 16mMultiple Airlines

Deal found 3/24

$94

Fri 4/45:05 pmBOS - ORD

Nonstop3h 10mJetBlue

Deal found 3/24

$99

Sun 4/136:10 amBOS - ORD

Nonstop3h 08mAmerican Airlines

Deal found 3/24

$100

Fri 4/46:30 amBOS - MDW

Nonstop2h 45mSouthwest

Deal found 3/24

$109

Sun 4/67:00 amBOS - ORD

Nonstop3h 02mDelta

Deal found 3/24

$109

Sun 6/811:31 amBOS - MDW

1 stop20h 44mAllegiant Air

Deal found 3/24

$110

Fri 5/3011:41 amBOS - RFD

1 stop22h 43mAllegiant Air

Deal found 3/24

$112

Fri 4/45:30 amBOS - MDW

1 stop7h 38mFrontier

Deal found 3/24

$125

Mon 3/316:00 amBOS - ORD

1 stop9h 16mFrontier

Deal found 3/25

$130

Tue 4/155:25 amBOS - STL

3 stops14h 16mMultiple Airlines

Deal found 3/24

$144

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

Wed 4/9

5:15 pm-7:27 pm

Nonstop3h 12m

Chicago O'Hare Intl

Fri 4/11

8:29 pm-11:58 pm

Nonstop2h 29m

$154

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Fri 4/25

8:35 pm-9:24 am

1 stop13h 49m

Chicago O'Hare Intl

Wed 4/30

7:47 pm-10:22 am

1 stop13h 35m

$155

BostonChicago

BOS - MDW

BOSMDW

Boston Logan Intl

Fri 5/2

4:40 pm-6:20 pm

Nonstop2h 40m

Chicago Midway

Sun 5/4

6:50 am-10:05 am

Nonstop2h 15m

$157

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Fri 4/4

5:00 am-6:55 am

Nonstop2h 55m

Chicago O'Hare Intl

Tue 4/8

9:50 am-1:20 pm

Nonstop2h 30m

$158

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Thu 6/12

7:45 am-9:43 am

Nonstop2h 58m

Chicago O'Hare Intl

Sun 6/15

6:30 am-9:56 am

Nonstop2h 26m

$161

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Sun 4/13

5:45 am-11:50 am

1 stop7h 05m

Chicago O'Hare Intl

Wed 4/16

1:50 pm-7:10 pm

1 stop4h 20m

$176

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Thu 5/1

7:30 am-9:30 am

Nonstop3h 00m

Chicago O'Hare Intl

Sun 5/4

7:00 am-10:26 am

Nonstop2h 26m

$197

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Thu 5/15

5:04 pm-12:24 am

1 stop8h 20m

Chicago O'Hare Intl

Sun 5/18

4:15 pm-1:05 am

1 stop7h 50m

$221

BostonChicago

BOS - MDW

BOSMDW

Boston Logan Intl

Fri 5/9

6:00 am-12:24 pm

1 stop7h 24m

Chicago Midway

Fri 5/16

1:19 pm-12:44 am

1 stop10h 25m

$239

BostonPeoria

BOS - PIA

BOSPIA

Boston Logan Intl

Thu 5/15

6:00 am-9:19 am

2 stops28h 19m

Greater Peoria

Mon 5/19

4:14 pm-9:09 am

2 stops15h 55m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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 $323). 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 Tuesday (51 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 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

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,785 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Southwest

8.0

Very good

4,272 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,890 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,605 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

JetBlue

7.3

Good

2,924 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 ($79), Spirit Airlines ($83), and JetBlue ($99).
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 WestJet (96%), Avianca (89%) or Virgin Atlantic (86%) 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 $888, our data shows the cheapest flight currently is $78. When looking at the most popular route, (Boston Logan Intl - Chicago O'Hare Intl), you can expect to pay $97 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 $323). 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$105	FlexibilityNo cancel fee	On-time65%
JetBlue	Cheapest$83	Average$235	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$97	Average$336	FlexibilityNo cancel fee	On-timeN/A
Frontier	Cheapest$98	Average$147	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$142	Average$481	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$147	Average$511	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$153	Average$248	FlexibilityNo cancel fee	On-time63%

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$79+ 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 4/3. 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 March 25, 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 March 25, 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 March 25, 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 March 25, 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 March 25, 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 March 25, 2025.