What airlines fly to Illinois?

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Illinois from Baltimore according to our data. United Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Baltimore to Illinois on average per week?

As of June 2026, 117 flights take off from Baltimore and land in Illinois each week. The most common flight departure day for this route is Wed, with 31% of weekly flights taking off on this day.

What is the cheapest airline that flies from Baltimore/Washington to Illinois?

Delta, Southwest, and United Airlines are the most popular carriers operating from Baltimore/Washington to Illinois

How many flights depart from Baltimore to Illinois on average per day?

As of June 2026, there are 16 flights per day flying from Baltimore to Illinois. The most common time of day flights depart is 10:00AM, with 54% of flights taking off at noon.

When did momondo last update prices for flights from Baltimore/Washington Airport to Illinois?

Prices for flights from Baltimore/Washington Airport to Illinois are refreshed on a daily basis.

How many operators does momondo search for flights from Baltimore/Washington Airport to Illinois?

As of June 2026, there are 5 operators available to choose from for flights from Baltimore/Washington Airport to Illinois.

How old do you have to be to fly from Baltimore/Washington Airport to Illinois?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Baltimore/Washington Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$68 Cheap Flights from Baltimore to Illinois in 2026

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Find the cheapest flights from Baltimore to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:25 am - 5:37 pm

BWI

STL

10h 12m

1 stop

6:33 pm - 7:45 am

STL

BWI

12h 12m

1 stop

$139Frontier

Thu, Aug 13 - Tue, Aug 18

9:49 pm - 5:30 pm

BWI

STL

20h 41m

1 stop

6:33 pm - 7:45 am

STL

BWI

12h 12m

1 stop

$173Frontier

Sat, Aug 29 - Tue, Sep 1

1:00 pm - 4:10 pm

BWI

MDW

4h 10m

1 stop

7:35 pm - 10:25 pm

MDW

BWI

1h 50mnonstop

$226Southwest

Wed, Jul 1 - Wed, Jul 1

10:55 am - 1:30 pm

BWI

MDW

3h 35m

1 stop

5:55 am - 8:40 am

MDW

BWI

1h 45mnonstop

$227Southwest

Wed, Aug 19 - Sat, Aug 22

8:18 pm - 12:01 am

BWI

ORD

4h 43m

1 stop

6:51 am - 9:58 am

ORD

BWI

2h 07mnonstop

$230American Airlines

Tue, Jul 7 - Tue, Jul 21

1:05 pm - 10:37 am

BWI

RFD

22h 32m

1 stop

11:27 am - 12:10 pm

RFD

BWI

23h 43m

1 stop

$230Multiple Airlines

Sat, Jul 25 - Sun, Aug 2

6:25 pm - 8:00 pm

BWI

ORD

2h 35mnonstop

5:49 pm - 10:58 pm

ORD

BWI

4h 09m

1 stop

$231American Airlines

Wed, Aug 26 - Mon, Aug 31

1:05 pm - 10:37 am

BWI

RFD

22h 32m

1 stop

7:50 pm - 8:54 am

RFD

BWI

12h 04m

1 stop

$242Multiple Airlines

Sat, Jul 11 - Mon, Jul 13

6:38 pm - 11:20 pm

BWI

PIA

5h 42m

1 stop

5:43 pm - 12:28 am

PIA

BWI

5h 45m

1 stop

$290United Airlines

Tue, Jun 30 - Tue, Jul 7

8:16 am - 1:57 pm

BWI

PIA

6h 41m

1 stop

10:44 am - 5:36 pm

PIA

BWI

5h 52m

1 stop

$341United Airlines

Tue, Jun 30 - Sat, Jul 4

Frontier flights from Baltimore to Illinois

Our best Frontier deals on Baltimore to Illinois flight tickets

Frontier

Aug 13

BWI8:25 amBaltimore/Washington

10h 12m

1 stop

STL5:37 pmLambert-St Louis

Aug 18

STL6:33 pmLambert-St Louis

12h 12m

1 stop

BWI7:45 amBaltimore/Washington

$139

Frontier

Sep 22

BWI9:20 pmBaltimore/Washington

13h 20m

1 stop

STL9:40 amLambert-St Louis

Sep 26

STL10:35 amLambert-St Louis

7h 01m

1 stop

BWI6:36 pmBaltimore/Washington

$163

Frontier

Aug 27

BWI8:52 amBaltimore/Washington

9h 38m

1 stop

STL5:30 pmLambert-St Louis

Aug 30

STL6:33 pmLambert-St Louis

12h 12m

1 stop

BWI7:45 amBaltimore/Washington

$171

American Airlines flights from Baltimore to Illinois

Our best American Airlines deals on Baltimore to Illinois flight tickets

American Airlines

Aug 26

BWI4:25 pmBaltimore/Washington

7h 15m

1 stop

STL10:40 pmLambert-St Louis

Aug 31

STL10:22 amLambert-St Louis

6h 23m

1 stop

BWI5:45 pmBaltimore/Washington

$211

American Airlines

Jul 7

BWI10:06 amBaltimore/Washington

7h 40m

1 stop

ORD4:46 pmChicago O'Hare Intl

Jul 8

ORD9:25 pmChicago O'Hare Intl

2h 08m

BWI12:33 amBaltimore/Washington

$230

American Airlines

Aug 26

BWI6:25 pmBaltimore/Washington

2h 35m

ORD8:00 pmChicago O'Hare Intl

Aug 31

ORD5:49 pmChicago O'Hare Intl

4h 09m

1 stop

BWI10:58 pmBaltimore/Washington

$231

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Thu 8/13

8:25 am-5:37 pm

1 stop10h 12m

Lambert-St Louis

Tue 8/18

6:33 pm-7:45 am

1 stop12h 12m

$139

BaltimoreSt. Louis

BWI - STL

BWISTL

Baltimore/Washington

Sat 8/29

9:49 pm-5:30 pm

1 stop20h 41m

Lambert-St Louis

Tue 9/1

6:33 pm-7:45 am

1 stop12h 12m

$173

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 7/1

1:00 pm-4:10 pm

1 stop4h 10m

Chicago Midway

Wed 7/1

7:35 pm-10:25 pm

Nonstop1h 50m

$226

Quickest round-trip

BaltimoreChicago

BWI - MDW

BWIMDW

Baltimore/Washington

Wed 8/19

10:55 am-1:30 pm

1 stop3h 35m

Chicago Midway

Sat 8/22

5:55 am-8:40 am

Nonstop1h 45m

$227

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Tue 7/7

8:18 pm-12:01 am

1 stop4h 43m

Chicago O'Hare Intl

Tue 7/21

6:51 am-9:58 am

Nonstop2h 07m

$230

BaltimoreChicago

BWI - RFD

BWIRFD

Baltimore/Washington

Sat 7/25

1:05 pm-10:37 am

1 stop22h 32m

Chicago Greater Rockford

Sun 8/2

11:27 am-12:10 pm

1 stop23h 43m

$230

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Wed 8/26

6:25 pm-8:00 pm

Nonstop2h 35m

Chicago O'Hare Intl

Mon 8/31

5:49 pm-10:58 pm

1 stop4h 09m

$231

BaltimoreChicago

BWI - RFD

BWIRFD

Baltimore/Washington

Sat 7/11

1:05 pm-10:37 am

1 stop22h 32m

Chicago Greater Rockford

Mon 7/13

7:50 pm-8:54 am

1 stop12h 04m

$242

BaltimorePeoria

BWI - PIA

BWIPIA

Baltimore/Washington

Tue 6/30

6:38 pm-11:20 pm

1 stop5h 42m

Greater Peoria

Tue 7/7

5:43 pm-12:28 am

1 stop5h 45m

$290

BaltimorePeoria

BWI - PIA

BWIPIA

Baltimore/Washington

Tue 6/30

8:16 am-1:57 pm

1 stop6h 41m

Greater Peoria

Sat 7/4

10:44 am-5:36 pm

1 stop5h 52m

$341

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Baltimore to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Baltimore is in February. Flight prices, which tend to average around $43, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $45.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Baltimore to Illinois is on a Friday when prices can be found for as low as $292. Flights from Baltimore to Illinois on a Sunday will generally be more expensive and average around $432. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Baltimore to Illinois during this time can be as low as $261. Flights in the morning are often more expensive with an average ticket price of $407.

What is the cheapest Baltimore/Washington to Illinois flight route?

Fly from Baltimore/Washington to Chicago O'Hare Intl for the best Baltimore/Washington - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Baltimore when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $272 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Baltimore for as low as $199 on momondo.

What cabin class options are available on Baltimore to Illinois flights?

There are 4 cabin classes available to choose from on Baltimore to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Baltimore to Illinois flights?

No. A direct flight is the cheapest option for a flight between Baltimore to Illinois.

Cheap Baltimore to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Baltimore to Illinois

Best Price Found	$183
Fastest flight time	2h 00m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Baltimore in the past 72 hours is $183. The best round-trip flight deal from Baltimore to Illinois found on momondo in the last 72 hours is $318.

The fastest flight from Baltimore to Illinois takes 2h 00m

Direct flights go from Baltimore to Illinois every day.

There are 98 airports in Illinois. From Baltimore there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from Baltimore to Illinois

When did momondo last update prices for flights from Baltimore/Washington Airport to Illinois?
Prices for flights from Baltimore/Washington Airport to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Baltimore/Washington Airport to Illinois?
As of June 2026, there are 5 operators available to choose from for flights from Baltimore/Washington Airport to Illinois.
How old do you have to be to fly from Baltimore/Washington Airport to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Baltimore/Washington Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Baltimore to Illinois?
Based on momondo bookings for flights between Baltimore and Illinois, the leading plane model is Boeing 737 MAX 8, making up 14.79% of the total bookings. Other popular models include Boeing 737-800 with 10.70%, Boeing 737-900 with 10.01%, and Embraer 175 with 8.00%.

Best airlines flying from Baltimore to Illinois

Compare and see reviews for airlines that fly from Baltimore to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $57	Free Cancellation	Rating 5.6 2,920 reviews	Search Frontier flights
Southwest	PriceFrom $122	Free Cancellation	Rating 8.0 4,255 reviews	Search Southwest flights
United Airlines	PriceFrom $131	Free Cancellation	Rating 7.4 9,772 reviews	Search United Airlines flights
American Airlines	PriceFrom $158	Free Cancellation	Rating 7.1 11,642 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Baltimore to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Baltimore to Illinois. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Baltimore to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Baltimore which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Baltimore to Illinois?

Once all potential Baltimore to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Baltimore to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from Baltimore are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.