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$71+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BWI
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
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 June 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/9. 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 7/294:57 pm
STL
-
BWI
1 stop5h 20m
Frontier
Wed 8/59:37 pm
BWI
-
STL
1 stop21h 00m
Frontier
Deal found 6/9$155
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
Sat 8/14:57 pm
STL
-
BWI
1 stop5h 20m
Frontier
Mon 8/39:37 pm
BWI
-
STL
1 stop21h 00m
Frontier
Deal found 6/6$157
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Wed 7/294:57 pm
STL
-
BWI
1 stop13h 29m
Frontier
Mon 8/39:37 pm
BWI
-
STL
1 stop21h 00m
Frontier
Deal found 6/5$160
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Wed 8/265:33 pm
STL
-
BWI
1 stop13h 12m
Frontier
Sat 9/269:20 pm
BWI
-
STL
1 stop13h 20m
Frontier
Deal found 6/5$169
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Mon 6/295:06 pm
STL
-
BWI
1 stop13h 29m
Frontier
Tue 6/307:16 pm
BWI
-
STL
1 stop14h 36m
Frontier
Deal found 6/8$170
This Kiwi.com deal was found by Cheapflights users on 6/8. 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.
Mon 6/295:06 pm
STL
-
BWI
1 stop13h 29m
Frontier
Wed 7/17:27 pm
BWI
-
STL
1 stop23h 03m
Frontier
Deal found 6/8$171
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Mon 7/274:57 pm
STL
-
BWI
1 stop13h 29m
Frontier
Mon 8/39:37 pm
BWI
-
STL
1 stop21h 00m
Frontier
Deal found 6/5$177
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Tue 7/286:34 pm
STL
-
BWI
1 stop11h 52m
Frontier
Tue 8/48:36 am
BWI
-
STL
1 stop10h 01m
Frontier
Deal found 6/5$182
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
Sat 8/84:57 pm
STL
-
BWI
1 stop13h 29m
Frontier
Tue 8/119:37 pm
BWI
-
STL
1 stop12h 20m
Frontier
Deal found 6/6$186
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Mon 7/274:57 pm
STL
-
BWI
1 stop13h 29m
Frontier
Tue 8/46:35 am
BWI
-
STL
1 stop12h 02m
Frontier
Deal found 6/5$188
This American Airlines deal was found by Cheapflights users on 6/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:29 am
ORD
-
BWI
1 stop6h 28m
American Airlines
Tue 9/292:08 pm
BWI
-
ORD
Nonstop2h 21m
American Airlines
Deal found 6/5$230
This Southwest deal was found by Cheapflights users on 6/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/15:00 am
MDW
-
BWI
Nonstop1h 45m
Southwest
Tue 8/47:45 pm
BWI
-
MDW
Nonstop2h 00m
Southwest
Deal found 6/7$231

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 June 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$145
(Kiwi.com)

One-way from

$71
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$329
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. 15% potential increase in price ($48 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 June 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 June 10, 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

Mon 8/17

9:00 am-11:55 am

Nonstop1h 55m

Baltimore/Washington

Wed 8/19

2:50 pm-3:50 pm

Nonstop2h 00m

$235

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Wed 9/30

8:30 am-1:35 pm

1 stop4h 05m

Baltimore/Washington

Sat 10/3

3:00 pm-6:05 pm

1 stop4h 05m

$246

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Mon 9/21

8:15 am-12:25 pm

1 stop3h 10m

Baltimore/Washington

Thu 9/24

4:50 pm-7:35 pm

1 stop3h 45m

$250

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Tue 6/30

7:50 am-12:00 pm

1 stop3h 10m

Baltimore/Washington

Fri 7/3

10:40 am-2:05 pm

1 stop4h 25m

$250

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Wed 10/21

1:15 pm-6:46 pm

1 stop4h 31m

Baltimore/Washington

Sat 10/24

5:30 pm-8:24 pm

1 stop3h 54m

$251
Quickest round-trip

ChicagoBaltimore

MDW - BWI

MDWBWI

Chicago Midway

Mon 7/13

7:00 am-9:45 am

Nonstop1h 45m

Baltimore/Washington

Tue 7/14

6:30 pm-7:35 pm

Nonstop2h 05m

$253

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Fri 7/3

3:22 pm-9:25 pm

1 stop5h 03m

Baltimore/Washington

Tue 7/7

5:27 pm-8:31 pm

1 stop4h 04m

$259

PeoriaBaltimore

PIA - BWI

PIABWI

Greater Peoria

Tue 6/30

6:40 pm-12:28 am

1 stop4h 48m

Baltimore/Washington

Wed 7/8

8:16 am-12:38 pm

1 stop5h 22m

$261

ChicagoBaltimore

ORD - BWI

ORDBWI

Chicago O'Hare Intl

Thu 11/5

3:35 pm-12:26 am

1 stop7h 51m

Baltimore/Washington

Mon 11/9

6:00 am-12:06 pm

1 stop7h 06m

$265

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

Tue 9/15

4:30 pm-7:30 pm

Nonstop2h 00m

Baltimore/Washington

Thu 9/24

9:50 am-1:15 pm

1 stop4h 25m

$266

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/5

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

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 $506). 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 June 10, 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 27% versus a flight in the evening.

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 June 10, 2026.

The most flights from USIL to BWI are scheduled on a Monday (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

How much does it cost to fly round-trip 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 73 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 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 June 8, 2026.

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

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 1h 55m. The distance from Illinois to Baltimore is about 609 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), United Airlines ($74), and American Airlines ($78).

  • 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: Royal Jordanian (85%), Republic Airways (78%), Cathay Pacific (78%).

  • What are the cheapest flights from Illinois to Baltimore?

    While on average a flight from Illinois to Baltimore is generally $343, our data shows the cheapest flight currently is $98. When looking at the most popular route, (Chicago O'Hare Intl - Baltimore/Washington), you can expect to pay $165 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 $506). 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

See prices for flight routes from nearby airports that may be better suited for you.
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San Francisco to Reagan-National flights
Seattle to Baltimore flights
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Boston to Baltimore flights
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San Francisco to Philadelphia flights
Denver to Baltimore flights
George Bush Intcntl to Dulles Intl flights
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Tampa to Baltimore flights
George Bush Intcntl to Reagan-National flights
Miami to Philadelphia flights
Los Angeles to Philadelphia flights
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Orlando to Dulles Intl flights
Hobby to Philadelphia flights
Denver to Philadelphia flights
George Bush Intcntl to Philadelphia flights
San Diego to Dulles Intl flights
Seattle to Philadelphia flights
Orlando to Reagan-National flights
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Atlanta to Philadelphia flights
Fort Lauderdale to Dulles Intl flights
Sky Harbor Intl to Dulles Intl flights

Top 5 airlines flying from Illinois to Baltimore

Discover the top 5 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 June 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$57Average$162FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$127Average$264FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$146Average$375FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$148Average$370FlexibilityNo cancel feeOn-time71%
DeltaCheapest$183Average$364FlexibilityNo cancel feeOn-timeN/A

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