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$69+ Cheap flights from Baltimore (BWI) 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap flight deals from Baltimore to Illinois

Keep the following information in mind while searching for Baltimore to Illinois flight deals. Data was last updated August 20, 2025.

Round-trip from

$112
(Frontier)

One-way from

$69
(Gotogate)

Popular in

April

Cheapest in

September

Average price

$252
From Baltimore/Washington to Illinois
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One-way flight from Baltimore/Washington to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Baltimore to Illinois

Cheapest flights from Baltimore to Illinois
Explore the most affordable flight options available from Baltimore to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This Frontier deal was found by Cheapflights users on 8/20. 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.
Sat 10/184:12 pmBWI - MDW
Nonstop2h 01mFrontier
Thu 10/2312:30 pmMDW - BWI
Nonstop1h 57mFrontier
Deal found 8/20$112
This Cheapflightsfares deal was found by Cheapflights users on 8/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/255:40 pmBWI - MDW
Nonstop2h 03mFrontier
Fri 9/265:15 pmMDW - BWI
1 stop6h 02mFrontier
Deal found 8/18$113
This Cheapflightsfares deal was found by Cheapflights users on 8/19. 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 10/29:59 pmBWI - ORD
Nonstop2h 21mFrontier
Mon 10/66:21 pmORD - BWI
1 stop5h 32mFrontier
Deal found 8/19$113
This Mytrip deal was found by Cheapflights users on 8/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/125:40 pmBWI - MDW
Nonstop2h 03mFrontier
Sat 9/136:15 amMDW - BWI
1 stop16h 51mFrontier
Deal found 8/20$114
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/259:57 amBWI - ORD
Nonstop2h 13mSpirit Airlines
Mon 9/295:05 amORD - BWI
1 stop10h 46mSpirit Airlines
Deal found 8/19$114
This Frontier deal was found by Cheapflights users on 8/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/65:40 pmBWI - MDW
Nonstop2h 03mFrontier
Tue 10/78:05 amMDW - BWI
1 stop8h 15mFrontier
Deal found 8/18$115
This Frontier deal was found by Cheapflights users on 8/19. 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.
Thu 9/49:59 pmBWI - ORD
Nonstop2h 21mFrontier
Sat 9/65:40 pmORD - BWI
1 stop5h 26mFrontier
Deal found 8/19$115
This Cheapflightsfares deal was found by Cheapflights users on 8/19. 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.
Fri 9/265:40 pmBWI - MDW
Nonstop2h 03mFrontier
Mon 9/291:49 pmMDW - BWI
Nonstop2h 01mFrontier
Deal found 8/19$116
This Priceline deal was found by Cheapflights users on 8/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/29:57 amBWI - ORD
Nonstop2h 13mSpirit Airlines
Fri 10/1011:52 amORD - BWI
1 stop10h 35mSpirit Airlines
Deal found 8/18$116
This Cheapflightsfares deal was found by Cheapflights users on 8/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/284:01 pmBWI - MDW
Nonstop2h 04mFrontier
Sun 8/318:40 amMDW - BWI
Nonstop1h 54mFrontier
Deal found 8/18$117
This Priceline deal was found by Cheapflights users on 8/20. 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.
Mon 10/69:59 pmBWI - ORD
Nonstop2h 21mFrontier
Tue 10/73:12 pmORD - BWI
1 stop7h 41mFrontier
Deal found 8/20$117
This Frontier deal was found by Cheapflights users on 8/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/55:40 pmBWI - MDW
Nonstop2h 03mFrontier
Fri 10/104:12 pmMDW - BWI
Nonstop1h 56mFrontier
Deal found 8/18$118

Cheapflights Fare Finder

 
Customize your flight search to find flights from Baltimore to Illinois 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 August 20, 2025.
Use the filters below to find and compare flights from Baltimore to Illinois that are best for you.

Fly from

Baltimore

Fly to

Illinois

Route

Depart

Return

Price

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 10/2

11:43 am-3:58 pm

1 stop5h 15m

Chicago Midway

Mon 10/6

1:49 pm-4:50 pm

Nonstop2h 01m

$113

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 9/24

8:12 am-3:58 pm

1 stop8h 46m

Chicago Midway

Thu 9/25

1:49 pm-4:50 pm

Nonstop2h 01m

$113

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 9/25

5:40 pm-6:43 pm

Nonstop2h 03m

Chicago Midway

Fri 9/26

5:15 pm-12:17 am

1 stop6h 02m

$113

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Sat 10/18

4:12 pm-5:13 pm

Nonstop2h 01m

Chicago Midway

Tue 10/21

8:05 am-5:20 pm

1 stop8h 15m

$113

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 10/8

8:45 am-1:38 pm

1 stop5h 53m

Chicago Midway

Sun 10/12

12:44 pm-3:41 pm

Nonstop1h 57m

$113

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Sun 10/5

9:59 pm-11:20 pm

Nonstop2h 21m

Chicago O'Hare Intl

Wed 10/8

11:00 am-5:20 pm

1 stop5h 20m

$113

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Wed 9/24

8:12 am-5:39 pm

1 stop10h 27m

Chicago O'Hare Intl

Thu 9/25

6:11 pm-9:14 pm

Nonstop2h 03m

$113

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Fri 11/14

6:00 am-10:41 am

1 stop5h 41m

Chicago O'Hare Intl

Sun 11/16

12:02 pm-3:05 pm

Nonstop2h 03m

$113

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Fri 9/26

1:17 pm-9:58 pm

1 stop9h 41m

Chicago O'Hare Intl

Sun 9/28

6:10 am-9:02 am

Nonstop1h 52m

$114

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Thu 9/18

9:38 am-5:39 pm

1 stop9h 01m

Chicago O'Hare Intl

Sun 9/21

6:10 am-9:02 am

Nonstop1h 52m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 60 results
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Best time to book a flight from Baltimore to Illinois

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

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

Currently, August is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $245). Flying from Baltimore 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 BWI to IL?

Find hourly flight availability from Baltimore 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 August 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Baltimore to Illinois as you normally would.

Weekly flight availability from Baltimore to Illinois

Explore weekly flight availability from Baltimore 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 August 20, 2025.

The most flights from BWI to USIL are scheduled on a Monday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated August 20, 2025.
Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from Baltimore to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,928 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,039 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,207 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Baltimore 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 Baltimore to Illinois?

    If you book a flight to Illinois from Baltimore, you will be flying from Baltimore/Washington, which is the city’s only airport. Baltimore/Washington (BWI) is located 8.5 mi from the center of Baltimore.

  • How long is the flight from Baltimore to Illinois?

    Frontier and Spirit Airlines can get you from Baltimore to Illinois in just under 5h 15m. Your travel time can differ by up to 4h 26m. Baltimore and Illinois are separated by a distance of 609 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    When deciding which route to take from Baltimore to Illinois consider Baltimore/Washington - Chicago O'Hare Intl, Baltimore/Washington - Chicago Midway or Baltimore/Washington - Lambert-St Louis as they are the most popular.

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

    Consider Republic Airways (100%), ANA (95%) or Japan Airlines (87%) when booking your flight. These represent the most reliable airlines when flying from Baltimore to Illinois.

  • What are the cheapest flights from Baltimore to Illinois?

    Looking for the cheapest flight from Baltimore to Illinois? While on average our users pay $1,067, our data indicates the cheapest price to be $72. The most popular route (Baltimore/Washington - Chicago O'Hare Intl), is priced around $88.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Baltimore 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 Baltimore to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $245). Flying from Baltimore 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.

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Alternative routes for Baltimore to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Baltimore to Illinois

Discover the top 6 airlines that operate flights from Baltimore to Illinois. 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$46Average$135FlexibilityNo cancel feeOn-time65%
FrontierCheapest$62Average$166FlexibilityNo cancel feeOn-time62%
DeltaCheapest$98Average$377FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$157Average$352FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$157Average$289FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$158Average$414FlexibilityNo cancel feeOn-time71%

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