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$61+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
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 January 7, 2026.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$69
(Kiwi.com)

One-way from

$61
(Frontier)

Popular in

December

Cheapest in

September

Average price

$229
Provider with most accurate pricing for Washington, D.C. (WAS)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Chicago (CHI) flights.
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From Baltimore/Washington to Illinois
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One-way flight from Baltimore/Washington to Illinois
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Highest demand for flights based on searches. 5% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 7, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2212:05 pmBWI - ORD
Nonstop2h 27mFrontier
Mon 1/268:45 amORD - BWI
Nonstop2h 00mFrontier
Deal found 1/6$69
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2912:05 pmBWI - ORD
Nonstop2h 27mFrontier
Sun 2/15:25 amORD - BWI
Nonstop2h 00mFrontier
Deal found 1/6$72
This Frontier deal was found by Cheapflights users on 1/6. 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 1/2612:40 pmBWI - ORD
Nonstop2h 27mFrontier
Sun 2/15:25 amORD - BWI
Nonstop2h 00mFrontier
Deal found 1/6$73
This Frontier deal was found by Cheapflights users on 1/5. 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 1/182:24 pmBWI - ORD
Nonstop2h 27mFrontier
Thu 1/228:10 amORD - BWI
Nonstop2h 00mFrontier
Deal found 1/5$74
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/59:19 amBWI - ORD
Nonstop2h 27mFrontier
Mon 4/66:00 amORD - BWI
Nonstop2h 02mFrontier
Deal found 1/6$79
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/269:19 amBWI - ORD
Nonstop2h 27mFrontier
Sun 3/16:05 pmORD - BWI
Nonstop2h 09mFrontier
Deal found 1/5$83
This Frontier deal was found by Cheapflights users on 1/5. 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 1/2212:05 pmBWI - ORD
Nonstop2h 27mFrontier
Fri 1/306:05 amORD - BWI
Nonstop2h 00mFrontier
Deal found 1/5$84
This CheapOair deal was found by Cheapflights users on 1/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/94:28 pmBWI - ORD
Nonstop2h 27mFrontier
Mon 3/1612:43 pmORD - BWI
Nonstop2h 00mFrontier
Deal found 1/6$85
This Priceline deal was found by Cheapflights users on 1/5. 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 1/2912:05 pmBWI - ORD
Nonstop2h 27mMultiple Airlines
Wed 2/412:44 pmORD - BWI
1 stop9h 09mMultiple Airlines
Deal found 1/5$87
This Frontier deal was found by Cheapflights users on 1/5. 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.
Fri 1/3010:00 amBWI - ORD
Nonstop2h 27mFrontier
Sun 2/15:25 amORD - BWI
Nonstop2h 00mFrontier
Deal found 1/5$88
This Frontier deal was found by Cheapflights users on 1/6. 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 2/47:10 amBWI - MDW
1 stop5h 55mFrontier
Wed 2/116:15 amMDW - BWI
1 stop10h 32mFrontier
Deal found 1/6$128
This CheapOair deal was found by Cheapflights users on 1/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/38:00 amBWI - STL
1 stop16h 33mFrontier
Sat 2/711:00 amSTL - BWI
1 stop6h 50mFrontier
Deal found 1/5$129

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 January 7, 2026.
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

Wed 2/11

1:45 pm-2:55 pm

Nonstop2h 10m

Chicago Midway

Tue 2/17

6:50 am-9:45 am

Nonstop1h 55m

$129

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Tue 3/10

8:09 am-9:32 am

Nonstop2h 23m

Chicago O'Hare Intl

Tue 3/17

6:40 pm-9:42 pm

Nonstop2h 02m

$129

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 2/4

7:45 am-9:05 am

Nonstop2h 20m

Chicago Midway

Thu 2/5

10:45 am-1:35 pm

Nonstop1h 50m

$129

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Tue 2/10

10:30 am-11:40 am

Nonstop2h 10m

Chicago Midway

Thu 2/12

7:20 am-10:15 am

Nonstop1h 55m

$129

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Sat 2/21

6:20 am-7:43 am

Nonstop2h 23m

Chicago O'Hare Intl

Sat 2/28

6:15 pm-9:17 pm

Nonstop2h 02m

$139

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Thu 1/29

10:05 am-11:25 am

Nonstop2h 20m

Chicago O'Hare Intl

Sat 1/31

6:15 pm-9:21 pm

Nonstop2h 06m

$144

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Sat 1/31

10:15 am-11:25 am

Nonstop2h 10m

Chicago Midway

Mon 2/2

9:50 am-12:40 pm

Nonstop1h 50m

$144

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Fri 2/6

4:25 pm-5:35 pm

Nonstop2h 10m

Chicago Midway

Mon 2/9

1:25 pm-4:10 pm

Nonstop1h 45m

$153

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 2/5

4:25 pm-5:35 pm

Nonstop2h 10m

Chicago Midway

Sun 2/8

5:15 pm-8:10 pm

Nonstop1h 55m

$153

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Fri 2/27

6:30 am-7:53 am

Nonstop2h 23m

Chicago O'Hare Intl

Sat 2/28

11:00 am-2:01 pm

Nonstop2h 01m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

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, March is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $48). Flying from Baltimore to Illinois in June is currently the most expensive (average of $133). 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 January 7, 2026.

When flying from Baltimore to Illinois, 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 52% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Baltimore to Illinois. Price data was last updated on January 3, 2026.

Travelers seeking maximum savings on their Baltimore to Illinois flight should consider departing on Friday at noon when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 January 7, 2026.

The most flights from BWI to USIL are scheduled on a Tuesday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

How much does it cost to fly round-trip from Baltimore to Illinois?

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 January 7, 2026.
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
4,249 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,249 reviews
Southwest
8.0
Very good
4,249 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,138 reviews
Southwest
8.0
Very good
4,249 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,088 reviews
Southwest
8.0
Very good
4,249 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Spirit Airlines
6.3
Okay
8,283 reviews
Southwest
8.0
Very good
4,249 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,064 reviews
Southwest
8.0
Very good
4,249 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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?

    Southwest, United Airlines, and Frontier can get you from Baltimore to Illinois in just under 2h 10m. Your travel time can differ by up to 25h 38m. 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 cheapest airlines to fly from Baltimore to Illinois one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $38. However, be on the lookout for offers from Spirit Airlines and American Airlines, as they are both options that can get you from Baltimore to Illinois for a low price.

  • 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 Cathay Pacific (85%), ANA (82%) or Japan Airlines (79%) 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 $631, our data indicates the cheapest price to be $60. The most popular route (Baltimore/Washington - Chicago O'Hare Intl), is priced around $83.

  • 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, March is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $48). Flying from Baltimore to Illinois in June is currently the most expensive (average of $133). 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

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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 January 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$52Average$121FlexibilityNo cancel feeOn-time65%
FrontierCheapest$58Average$165FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$131Average$324FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$148Average$288FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$173Average$398FlexibilityNo cancel feeOn-time71%
DeltaCheapest$242Average$442FlexibilityNo cancel feeOn-timeN/A

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