$45 Cheap Flights from Baltimore (BWI) to Chicago (CHI)

View $45 flight on Sun, Sep 28, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Chicago

Cheap Flights from Baltimore to Chicago (BWI-CHI)

Prices were available within the past 7 days and start at $45 for one-way flights and $88 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Oct 11 - Thu, Oct 16
BWI
Baltimore
MDW
Chicago
$88 Roundtrip, found 4 days ago
$88
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sat, Oct 11 from Baltimore to Chicago, returning Thu, Oct 16, priced at $88 found 4 days ago
Frontier Airlines
Sun, Sep 21 - Fri, Sep 26
BWI
Baltimore
MDW
Chicago
$90 Roundtrip, found 3 days ago
$90
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sun, Sep 21 from Baltimore to Chicago, returning Fri, Sep 26, priced at $90 found 3 days ago
Spirit Airlines
Thu, Sep 25 - Sun, Sep 28
BWI
Baltimore
ORD
Chicago
$90 Roundtrip, just found
$90
Roundtrip
just found
Select Spirit Airlines flight, departing Thu, Sep 25 from Baltimore to Chicago, returning Sun, Sep 28, priced at $90 just found
Frontier Airlines
Sat, Oct 25 - Thu, Oct 30
BWI
Baltimore
MDW
Chicago
$96 Roundtrip, found 2 days ago
$96
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Oct 25 from Baltimore to Chicago, returning Thu, Oct 30, priced at $96 found 2 days ago
Frontier Airlines
Thu, Oct 23 - Fri, Oct 31
BWI
Baltimore
MDW
Chicago
$98 Roundtrip, found 1 day ago
$98
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Oct 23 from Baltimore to Chicago, returning Fri, Oct 31, priced at $98 found 1 day ago
Spirit Airlines
Thu, Feb 5 - Sun, Feb 8
BWI
Baltimore
ORD
Chicago
$100 Roundtrip, found 2 hours ago
$100
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Thu, Feb 5 from Baltimore to Chicago, returning Sun, Feb 8, priced at $100 found 2 hours ago
Spirit Airlines
Sun, Sep 28 - Wed, Oct 1
BWI
Baltimore
ORD
Chicago
$102 Roundtrip, just found
$102
Roundtrip
just found
Select Spirit Airlines flight, departing Sun, Sep 28 from Baltimore to Chicago, returning Wed, Oct 1, priced at $102 just found
Southwest Airlines
Tue, Oct 28 - Sat, Nov 1
BWI
Baltimore
MDW
Chicago
$139 Roundtrip, found 3 days ago
$139
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Tue, Oct 28 from Baltimore to Chicago, returning Sat, Nov 1, priced at $139 found 3 days ago
United
Wed, Nov 12 - Tue, Nov 18
BWI
Baltimore
ORD
Chicago
$159 Roundtrip, just found
$159
Roundtrip
just found
Select United flight, departing Wed, Nov 12 from Baltimore to Chicago, returning Tue, Nov 18, priced at $159 just found
American Airlines
Mon, Nov 24 - Thu, Nov 27
BWI
Baltimore
RFD
Rockford
$248 Roundtrip, found 3 days ago
$248
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Nov 24 from Baltimore to Rockford, returning Thu, Nov 27, priced at $248 found 3 days ago

Find the cheapest month to fly from Baltimore (BWI) to Chicago (CHI)

February is typically the cheapest month to fly

From $68 - $270 per traveler.

Graph displaying average flight prices per month

Alternative airports near Chicago

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to O'Hare Intl. ORD. Cheapest option available. Average driving time to city center is 23 minutes. Flights from $152
ORD
O'Hare Intl.
Cheapest
Average driving time to city center23 min
Flights from $152
Select flight to Midway Intl. MDW. Closest option available. Average driving time to city center is 16 minutes. Flights from $157
MDW
Midway Intl.
Closest
Average driving time to city center16 min
Flights from $157
Flights from Baltimore (BWI) to Chicago (MDW)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Midway Intl.
Roundtrip price
$88
Distance
608 mi

Baltimore to Chicago Flights

The cheapest times to fly from Baltimore to Chicago

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to Chicago are during the month of October. You can find some of the cheapest flights from Baltimore to Chicago with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to Chicago

Sunday is one of the best days to book for cheap flights from Baltimore to Chicago: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Baltimore to Chicago

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to Chicago in 2025. You can also book with separate airlines for your outbound and return journeys, from $45 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to Chicago flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to Chicago airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much is a flight from BWI Marshall to Chicago, IL (CHI-All Airports)?
Based on fares advertised within the last 7 days on Expedia for flights departing within the next year, round-trip flights between BWI Marshall and Chicago, IL (CHI-All Airports) start from $88. Book now to score the best price for your big adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from BWI Marshall to Chicago, IL (CHI-All Airports)?
Every air carrier has a different set of terms and conditions. If you decide to cancel your trip, head to our Customer Service Portal.
How do I find cheap flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Chicago, IL (CHI-All Airports) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Chicago, IL (CHI-All Airports) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Chicago, IL (CHI-All Airports)?
Forget about a movie marathon on this flight — it's just 653 mi from Baltimore to Illinois. Find your way to your seat, order some snacks and you'll be there before you know it.
Which airlines fly direct from BWI Airport to Chicago, IL (CHI-All Airports)?
Southwest Airlines (WN) is the preferred option for many travelers. It offers 286 flights from BWI Marshall to Chicago, IL (CHI-All Airports) each month. Love some more options? Check out the fares with United Airlines (UA). This carrier offers 86 fights monthly between these destinations.
Are BWI to Chicago, IL (CHI-All Airports) flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can sometimes find a bargain, with some of the cheapest fares from BWI Airport to Chicago, IL (CHI-All Airports) popping up a few weeks prior to the departure date. If you'd rather plan ahead, Expedia compares and updates all the best flight deals regularly — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines quote prices so far in advance.

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*Available to One Key members.