HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$70+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
May 1 — May 81
Fri 5/1
Fri 5/8
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Baltimore to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 April 1, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Tue 5/128:52 am
BWI
-
STL
1 stop9h 41m
Frontier
Tue 5/196:33 pm
STL
-
BWI
1 stop20h 49m
Frontier
Deal found 3/31$134
This Expedia deal was found by Cheapflights users on 3/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/285:35 pm
BWI
-
STL
1 stop6h 44m
Frontier
Wed 4/298:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Deal found 3/28$140
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Wed 5/139:25 pm
BWI
-
STL
1 stop20h 29m
Frontier
Tue 5/196:33 pm
STL
-
BWI
1 stop12h 10m
Frontier
Deal found 3/31$146
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Wed 4/295:49 pm
BWI
-
STL
1 stop17h 37m
Frontier
Mon 5/48:23 pm
STL
-
BWI
1 stop10h 20m
Frontier
Deal found 3/31$147
This CheapOair deal was found by Cheapflights users on 3/28. 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 4/207:04 pm
BWI
-
STL
1 stop29h 15m
Frontier
Fri 4/244:59 pm
STL
-
BWI
1 stop26h 52m
Frontier
Deal found 3/28$151
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Tue 4/2812:17 pm
BWI
-
STL
1 stop19h 33m
Frontier
Tue 5/56:41 pm
STL
-
BWI
1 stop12h 02m
Frontier
Deal found 3/31$159
This Expedia deal was found by Cheapflights users on 3/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:23 pm
BWI
-
STL
1 stop9h 56m
Frontier
Wed 4/298:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Deal found 3/31$160
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Tue 5/59:25 pm
BWI
-
STL
1 stop12h 30m
Frontier
Mon 5/115:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 3/30$170
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Tue 5/129:25 pm
BWI
-
STL
1 stop12h 30m
Frontier
Mon 6/15:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 3/29$173
This Trip.com deal was found by Cheapflights users on 3/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:00 pm
BWI
-
MDW
1 stop20h 54m
Frontier
Mon 4/272:15 pm
MDW
-
BWI
1 stop9h 29m
Frontier
Deal found 3/28$173
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Tue 4/1412:17 pm
BWI
-
ORD
1 stop5h 43m
Multiple Airlines
Fri 4/177:15 pm
ORD
-
BWI
1 stop13h 00m
Multiple Airlines
Deal found 3/29$173
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Sun 5/109:25 pm
BWI
-
STL
1 stop12h 30m
Frontier
Tue 5/196:33 pm
STL
-
BWI
1 stop12h 10m
Frontier
Deal found 3/31$174

Find flight deals from Baltimore to Illinois

Keep the following information in mind while searching for Baltimore to Illinois flight deals. Data was last updated April 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$134
(Kiwi.com)

One-way from

$70
(Frontier)

Popular in

March

Cheapest in

September

Average price

$297
Provider with most accurate pricing for Washington, D.C. (WAS)-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Chicago (CHI) flights.
Search Deals
From Baltimore/Washington to Illinois
Search Deals
One-way flight from Baltimore/Washington to Illinois
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 April 1, 2026.
Use the filters below to find and compare flights from Baltimore to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Wed 4/29

6:00 am-7:21 am

Nonstop2h 21m

Chicago O'Hare Intl

Mon 5/4

6:00 pm-9:02 pm

Nonstop2h 02m

$208

BaltimoreChicago

BWI - RFD

BWIRFD

Baltimore/Washington

Sat 5/9

6:02 pm-9:47 am

1 stop16h 45m

Chicago Greater Rockford

Sun 5/17

10:37 am-7:43 am

2 stops20h 06m

$211

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Tue 4/28

6:20 pm-7:30 pm

Nonstop2h 10m

Chicago Midway

Tue 5/5

7:00 am-9:50 am

Nonstop1h 50m

$239

BaltimoreChicago

BWI - RFD

BWIRFD

Baltimore/Washington

Wed 6/3

4:33 pm-10:37 am

1 stop19h 04m

Chicago Greater Rockford

Sun 6/7

11:27 am-12:15 pm

1 stop23h 48m

$239

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Wed 4/29

3:42 pm-5:00 pm

Nonstop2h 18m

Chicago O'Hare Intl

Wed 5/6

11:10 am-2:13 pm

Nonstop2h 03m

$239

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 4/29

9:35 am-10:40 am

Nonstop2h 05m

Chicago Midway

Wed 5/6

7:40 am-12:45 pm

1 stop4h 05m

$245

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Mon 5/18

6:05 am-7:10 am

Nonstop2h 05m

Chicago Midway

Tue 5/26

12:50 pm-5:20 pm

1 stop3h 30m

$245

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 5/7

9:15 pm-10:20 pm

Nonstop2h 05m

Chicago Midway

Sat 5/9

3:45 pm-8:35 pm

1 stop3h 50m

$249

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Thu 5/28

10:45 am-2:55 pm

1 stop5h 10m

Chicago Midway

Mon 6/1

9:25 pm-12:15 am

Nonstop1h 50m

$249

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Sun 5/17

6:15 am-7:36 am

Nonstop2h 21m

Chicago O'Hare Intl

Tue 5/19

6:59 am-10:02 am

Nonstop2h 03m

$263

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

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, January is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $57). Flying from Baltimore to Illinois in June is currently the most expensive (average of $134). 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 April 1, 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 35% versus a flight in the morning.

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 March 28, 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. Saturday at noon 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 April 1, 2026.

The most flights from BWI to USIL are scheduled on a Wednesday (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 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 April 1, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andAmerican 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
4,334 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,334 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,529 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,545 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Spirit Airlines
6.3
Okay
8,572 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,006 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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?

    United Airlines, Southwest, and Delta can get you from Baltimore to Illinois in just under 2h 10m. Your travel time can differ by up to 5h 39m. 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 $40. 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 CommutAir (100%), Qatar Airways (91%) or ANA (88%) 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 $879, our data indicates the cheapest price to be $108. The most popular route (Baltimore/Washington - Chicago O'Hare Intl), is priced around $139.

  • 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, January is the cheapest month in which you can book a flight from Baltimore to Illinois (average of $57). Flying from Baltimore to Illinois in June is currently the most expensive (average of $134). 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

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

Alternative routes for Baltimore to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Dallas/Fort Worth flights
Dulles Intl to Las Vegas flights
Baltimore to Dallas/Fort Worth flights
Dulles Intl to Miami flights
Dulles Intl to Los Angeles flights
Dulles Intl to Orlando flights
Dulles Intl to Seattle flights
Baltimore to Miami flights
Philadelphia to Orlando flights
Baltimore to Los Angeles flights
Baltimore to O'Hare Intl flights
Dulles Intl to Atlanta flights
Reagan-National to Los Angeles flights
Reagan-National to Seattle flights
Baltimore to Las Vegas flights
Reagan-National to Miami flights
Reagan-National to Las Vegas flights
Baltimore to Atlanta flights
Reagan-National to Orlando flights
Dulles Intl to O'Hare Intl flights
Baltimore to Orlando flights
Baltimore to Fort Lauderdale flights
Philadelphia to Las Vegas flights
Dulles Intl to Denver flights
Dulles Intl to San Francisco flights
Dulles Intl to Fort Lauderdale flights
Dulles Intl to Hobby flights
Philadelphia to O'Hare Intl flights
Philadelphia to Fort Lauderdale flights
Reagan-National to Dallas/Fort Worth flights
Reagan-National to Hobby flights
Baltimore to Denver flights
Reagan-National to O'Hare Intl flights
Philadelphia to Miami flights
Reagan-National to San Francisco flights
Philadelphia to Denver flights
Philadelphia to Seattle flights
Baltimore to San Francisco flights
Dulles Intl to Boston flights
Reagan-National to Atlanta flights
Dulles Intl to Tampa flights
Dulles Intl to New Orleans flights
Philadelphia to Dallas/Fort Worth flights
Baltimore to Seattle flights
Baltimore to Tampa flights
Dulles Intl to Sky Harbor Intl flights
Philadelphia to San Francisco flights
Dulles Intl to George Bush Intcntl flights
Philadelphia to Hobby flights
Baltimore to Midway flights

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 April 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$41Average$108FlexibilityNo cancel feeOn-time65%
FrontierCheapest$57Average$167FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$131Average$319FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$134Average$285FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$158Average$394FlexibilityNo cancel feeOn-time71%
DeltaCheapest$239Average$486FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.