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$63+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — ORD
may. 8 — may. 151
vie. 5/8
vie. 5/15
1 adult, Economy
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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 abril 8, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/8. 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.
mar. 4/285:49 pm
BWI
-
STL
1 stop14h 01m
Frontier
mié. 4/298:23 pm
STL
-
BWI
1 stop10h 39m
Frontier
Deal found 4/8$125
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
mar. 6/99:43 pm
BWI
-
STL
1 stop12h 09m
Frontier
mar. 6/166:31 pm
STL
-
BWI
1 stop12h 04m
Frontier
Deal found 4/7$126
This Kiwi.com deal was found by Cheapflights users on 4/5. 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.
mar. 5/59:13 pm
BWI
-
STL
1 stop12h 42m
Frontier
mié. 5/135:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 4/5$127
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
mié. 5/69:13 pm
BWI
-
STL
1 stop20h 41m
Frontier
mié. 5/135:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 4/6$128
This Kiwi.com deal was found by Cheapflights users on 4/5. 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.
mar. 5/59:13 pm
BWI
-
STL
1 stop12h 42m
Frontier
lun. 5/115:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 4/5$129
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
mié. 5/69:13 pm
BWI
-
STL
1 stop20h 41m
Frontier
lun. 5/115:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 4/7$133
This Frontier deal was found by Cheapflights users on 4/6. 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.
vie. 5/15:35 pm
BWI
-
STL
1 stop6h 44m
Frontier
lun. 5/48:23 pm
STL
-
BWI
1 stop10h 20m
Frontier
Deal found 4/6$140
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
mié. 5/139:13 pm
BWI
-
STL
1 stop20h 41m
Frontier
mié. 5/205:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Deal found 4/7$141
This Kiwi.com deal was found by Cheapflights users on 4/7. 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.
jue. 4/306:05 am
BWI
-
STL
1 stop5h 21m
Frontier
lun. 5/48:23 pm
STL
-
BWI
1 stop10h 20m
Frontier
Deal found 4/7$148
This CheapOair deal was found by Cheapflights users on 4/3. 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.
vie. 4/2410:32 am
BWI
-
STL
1 stop13h 47m
Frontier
sáb. 5/28:23 pm
STL
-
BWI
1 stop10h 44m
Frontier
Deal found 4/3$151
This Booking.com deal was found by Cheapflights users on 4/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 5/711:32 am
BWI
-
ORD
Nonstop2h 22m
Frontier
dom. 5/107:30 am
ORD
-
BWI
Nonstop2h 07m
Frontier
Deal found 4/5$191
This Southwest deal was found by Cheapflights users on 4/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/2010:25 am
BWI
-
MDW
1 stop4h 25m
Southwest
mar. 5/267:40 am
MDW
-
BWI
1 stop4h 05m
Southwest
Deal found 4/6$192

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 abril 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$125
(Kiwi.com)

One-way from

$63
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$310
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. 9% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 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 abril 8, 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 - RFD

BWIRFD

Baltimore/Washington

vie. 5/22

1:43 pm-9:21 am

1 stop20h 38m

Chicago Greater Rockford

jue. 5/28

11:27 am-12:15 pm

1 stop23h 48m

$222

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

mié. 5/20

3:10 pm-4:15 pm

Nonstop2h 05m

Chicago Midway

dom. 5/24

9:20 am-12:10 pm

Nonstop1h 50m

$227

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

mié. 5/27

4:05 pm-7:00 pm

1 stop3h 55m

Chicago Midway

jue. 6/4

10:00 am-2:50 pm

1 stop3h 50m

$228

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

jue. 6/11

6:10 am-7:10 am

Nonstop2h 00m

Chicago Midway

mar. 6/16

5:30 pm-8:25 pm

Nonstop1h 55m

$233

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

mié. 4/29

6:03 am-10:19 am

1 stop5h 16m

Chicago O'Hare Intl

sáb. 5/2

5:04 pm-10:59 pm

1 stop4h 55m

$238

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

sáb. 5/23

6:20 pm-7:44 pm

Nonstop2h 24m

Chicago O'Hare Intl

sáb. 5/30

9:25 pm-12:33 am

Nonstop2h 08m

$239

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

lun. 5/25

8:05 pm-9:29 pm

Nonstop2h 24m

Chicago O'Hare Intl

jue. 5/28

2:25 pm-5:33 pm

Nonstop2h 08m

$239

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

sáb. 4/25

7:30 pm-8:40 pm

Nonstop2h 10m

Chicago Midway

sáb. 5/2

12:05 pm-2:55 pm

Nonstop1h 50m

$239

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

jue. 5/21

6:05 am-7:10 am

Nonstop2h 05m

Chicago Midway

mar. 5/26

12:50 pm-5:25 pm

1 stop3h 35m

$239

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

mar. 5/5

6:15 am-7:36 am

Nonstop2h 21m

Chicago O'Hare Intl

dom. 5/10

11:10 am-2:13 pm

Nonstop2h 03m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/8

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $139). 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 abril 8, 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 34% 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 April 4, 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 abril 8, 2026.

The most flights from BWI to USIL are scheduled on a Monday (24 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 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 abril 8, 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
4,337 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
4,337 reviews
Southwest
8.0
Very good
4,337 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
9,555 reviews
Southwest
8.0
Very good
4,337 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
11,563 reviews
Southwest
8.0
Very good
4,337 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
8,606 reviews
Southwest
8.0
Very good
4,337 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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
2,995 reviews
Southwest
8.0
Very good
4,337 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

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?

    Southwest, Delta, and United Airlines can get you from Baltimore to Illinois in just under 2h 05m. Your travel time can differ by up to 3h 11m. 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 Southwest, 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 (89%) or United Airlines (86%) 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 $881, our data indicates the cheapest price to be $116. The most popular route (Baltimore/Washington - Chicago O'Hare Intl), is priced around $121.

  • 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 $139). 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 abril 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$41Average$108FlexibilityNo cancel feeOn-time65%
FrontierCheapest$57Average$166FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$131Average$319FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$134Average$285FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$158Average$352FlexibilityNo cancel feeOn-time71%
DeltaCheapest$239Average$486FlexibilityNo cancel feeOn-timeN/A

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