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$85+ Cheap flights from Illinois to Baltimore (BWI)

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.
ORD — BWI
May 24 — May 311
Sun 5/24
Sun 5/31
1 adult, Economy
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Cheap flight deals from Illinois to Baltimore

Cheapest flights from Illinois to Baltimore
Explore the most affordable flight options available from Illinois to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.

This Frontier deal was found by Cheapflights users on 4/19. 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.
Mon 5/48:23 pm
STL
-
BWI
1 stop10h 20m
Frontier
Tue 5/128:52 am
BWI
-
STL
1 stop9h 41m
Frontier
Deal found 4/19$160
This Frontier deal was found by Cheapflights users on 4/20. 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 5/96:55 am
ORD
-
BWI
1 stop8h 54m
Frontier
Mon 5/1111:32 am
BWI
-
ORD
Nonstop2h 22m
Frontier
Deal found 4/20$164
This Frontier deal was found by Cheapflights users on 4/19. 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.
Sat 5/2311:59 am
MDW
-
BWI
1 stop9h 58m
Frontier
Sun 5/246:45 am
BWI
-
MDW
1 stop5h 27m
Frontier
Deal found 4/19$165
This Super.com deal was found by Cheapflights users on 4/20. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/121:59 pm
ORD
-
BWI
1 stop7h 58m
Frontier
Sun 5/179:59 pm
BWI
-
ORD
1 stop26h 14m
Frontier
Deal found 4/20$166
This Frontier deal was found by Cheapflights users on 4/21. 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 5/76:50 am
ORD
-
BWI
1 stop7h 56m
Frontier
Mon 5/1111:32 am
BWI
-
ORD
Nonstop2h 22m
Frontier
Deal found 4/21$167
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/275:27 pm
STL
-
BWI
1 stop13h 16m
Frontier
Mon 6/19:23 pm
BWI
-
STL
1 stop21h 10m
Frontier
Deal found 4/22$167
This Frontier deal was found by Cheapflights users on 4/20. 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.
Tue 5/51:59 pm
ORD
-
BWI
1 stop7h 58m
Frontier
Thu 5/1411:32 am
BWI
-
ORD
Nonstop2h 22m
Frontier
Deal found 4/20$168
This Frontier deal was found by Cheapflights users on 4/20. 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.
Fri 5/87:30 am
ORD
-
BWI
Nonstop2h 07m
Frontier
Sat 5/99:43 pm
BWI
-
ORD
1 stop11h 12m
Frontier
Deal found 4/20$169
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:55 am
ORD
-
BWI
1 stop8h 27m
Frontier
Sat 5/303:26 pm
BWI
-
ORD
1 stop8h 47m
Frontier
Deal found 4/20$171
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:50 pm
ORD
-
BWI
1 stop8h 07m
Frontier
Wed 6/38:52 am
BWI
-
ORD
1 stop11h 59m
Frontier
Deal found 4/20$172
This Frontier deal was found by Cheapflights users on 4/19. 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.
Mon 5/187:30 am
ORD
-
BWI
Nonstop2h 07m
Frontier
Mon 5/189:23 pm
BWI
-
ORD
1 stop11h 32m
Frontier
Deal found 4/19$173
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/196:33 pm
STL
-
BWI
1 stop12h 10m
Frontier
Tue 5/266:45 am
BWI
-
STL
1 stop11h 48m
Frontier
Deal found 4/21$173

Find flight deals from Illinois to Baltimore

Keep the following information in mind while searching for Illinois to Baltimore flight deals. Data was last updated April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$160
(Frontier)

One-way from

$85
(Trip.com)

Popular in

March

Cheapest in

August

Average price

$297
Provider with most accurate pricing for Chicago (CHI)-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Washington, D.C. (WAS) flights.
Search Deals
From Illinois to Baltimore/Washington
Search Deals
One-way flight from Illinois to Baltimore/Washington
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($11 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 Illinois to Baltimore 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 24, 2026.
Use the filters below to find and compare flights from Illinois to Baltimore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Thu 5/14

12:19 pm-6:22 pm

1 stop5h 03m

Baltimore/Washington

Sun 5/17

9:59 pm-3:57 pm

1 stop18h 58m

$190

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Tue 6/2

7:45 am-11:50 am

1 stop3h 05m

Baltimore/Washington

Tue 6/9

7:40 am-8:40 am

Nonstop2h 00m

$191

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Tue 5/19

7:50 am-12:00 pm

1 stop3h 10m

Baltimore/Washington

Tue 5/26

6:30 am-7:35 am

Nonstop2h 05m

$191

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Sat 5/16

11:10 am-2:13 pm

Nonstop2h 03m

Baltimore/Washington

Tue 5/26

7:05 pm-8:29 pm

Nonstop2h 24m

$212

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Thu 5/28

2:25 pm-5:33 pm

Nonstop2h 08m

Baltimore/Washington

Mon 6/1

5:32 pm-6:55 pm

Nonstop2h 23m

$239

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Sat 6/6

7:45 am-12:15 pm

1 stop3h 30m

Baltimore/Washington

Sat 6/6

2:25 pm-4:45 pm

1 stop3h 20m

$250

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Thu 9/24

3:42 pm-10:42 pm

1 stop6h 00m

Baltimore/Washington

Mon 9/28

8:10 am-2:38 pm

1 stop7h 28m

$251

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 5/19

2:30 pm-7:55 pm

1 stop4h 25m

Baltimore/Washington

Tue 5/26

6:10 am-7:30 am

Nonstop2h 20m

$252

PeoriaBaltimore

PIA - BWI

PIABWI

Greater Peoria

Wed 7/29

4:21 pm-12:14 am

1 stop6h 53m

Baltimore/Washington

Wed 8/5

7:24 pm-10:59 pm

1 stop4h 35m

$261

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Fri 6/5

1:00 pm-5:15 pm

1 stop3h 15m

Baltimore/Washington

Mon 6/8

5:10 pm-8:40 pm

1 stop4h 30m

$271

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Illinois to Baltimore

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

How far ahead should I book a flight from Illinois to Baltimore?

To ensure you get the cheapest price possible for a flight from Illinois to Baltimore, you should look to book at least 12 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from Illinois to Baltimore (average of $27). Flying from Illinois to Baltimore in October is currently the most expensive (average of $555). 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 IL to BWI?

Find hourly flight availability from Illinois to Baltimore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2026.

When flying from Illinois to Baltimore, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 26% versus a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Illinois to Baltimore. Price data was last updated on April 18, 2026.

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

Weekly flight availability from Illinois to Baltimore

Explore weekly flight availability from Illinois to Baltimore. 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 24, 2026.

The most flights from USIL to BWI are scheduled on a Thursday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 on average).

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

Related info for your journey

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

    If you book a flight to Baltimore from Illinois, you will be flying to 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 Illinois to Baltimore?

    Departing from Illinois to Baltimore will take you 2h 03m. The distance from Illinois to Baltimore is about 620 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Baltimore one-way?

    The cheapest airlines for a one-way flight from Illinois to Baltimore are Frontier ($36), Spirit Airlines ($38), and United Airlines ($74).

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

    The most popular flight routes from Illinois to Baltimore are Chicago O'Hare Intl - Baltimore/Washington, Chicago Midway - Baltimore/Washington and Lambert-St Louis - Baltimore/Washington.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to Baltimore on time: CommutAir (100%), Royal Jordanian (75%), United Airlines (73%).

  • What are the cheapest flights from Illinois to Baltimore?

    While on average a flight from Illinois to Baltimore is generally $450, our data shows the cheapest flight currently is $111. When looking at the most popular route, (Chicago O'Hare Intl - Baltimore/Washington), you can expect to pay $147 for that flight.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Illinois to Baltimore (average of $27). Flying from Illinois to Baltimore in October is currently the most expensive (average of $555). 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

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Alternative routes for Illinois to Baltimore

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Top 6 airlines flying from Illinois to Baltimore

Discover the top 6 airlines that operate flights from Illinois to Baltimore. 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 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$42Average$119FlexibilityNo cancel feeOn-time65%
FrontierCheapest$57Average$160FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$114Average$359FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$127Average$269FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$150Average$395FlexibilityNo cancel feeOn-time71%
DeltaCheapest$183Average$361FlexibilityNo cancel feeOn-timeN/A

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