Cheap flights from Washington, D.C. to Illinois from $39
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Illinois departing on 3/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights
These are some of the best round-trip flight deals from Washington, D.C. to Illinois that have been recently found on momondo from popular airlines, departing in the coming months.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from Washington, D.C. to Illinois.
Cheap last minute flights
Planning a quick getaway from Washington, D.C. to Illinois? These are the last-minute flight deals available now.
Cheap direct flights
If you prefer a non-stop journey, check out our latest direct flight deals to Illinois, so you can enjoy a seamless trip without layovers.
Spirit Airlines flights from Washington, D.C. to Illinois
Our best Spirit Airlines deals on Washington, D.C. to Illinois flight tickets
Spirit Airlines![Spirit Airlines]()
May 14![Spirit Airlines]()
May 17
BWI5:47 pmBaltimore/Washington
5h 41m
1 stop
ORD10:28 pmChicago O'Hare Intl
ORD6:00 amChicago O'Hare Intl
9h 51m
1 stop
BWI4:51 pmBaltimore/Washington
Spirit Airlines![Spirit Airlines]()
Jun 2![Spirit Airlines]()
Jun 4
BWI5:47 pmBaltimore/Washington
5h 41m
1 stop
ORD10:28 pmChicago O'Hare Intl
ORD6:00 amChicago O'Hare Intl
9h 51m
1 stop
BWI4:51 pmBaltimore/Washington
American Airlines flights from Washington, D.C. to Illinois
Our best American Airlines deals on Washington, D.C. to Illinois flight tickets
American Airlines![American Airlines]()
Mar 22![American Airlines]()
Mar 29
BWI7:30 amBaltimore/Washington
2h 21m
ORD8:51 amChicago O'Hare Intl
ORD6:49 pmChicago O'Hare Intl
1h 57m
BWI9:46 pmBaltimore/Washington
American Airlines![American Airlines]()
Apr 2![American Airlines]()
Apr 9
DCA7:00 amWashington, D.C. Reagan-National
2h 25m
ORD8:25 amChicago O'Hare Intl
ORD8:27 pmChicago O'Hare Intl
2h 08m
DCA11:35 pmWashington, D.C. Reagan-National
See travel insights to Illinois from
How to get the cheapest flight ticket from Washington, D.C. 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
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What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from Washington, D.C. is in September. Flight prices, which tend to average around $208, 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 September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $229.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Washington, D.C. to Illinois is on a Friday when prices can be found for as low as $394. Flights from Washington, D.C. to Illinois on a Monday will generally be more expensive and average around $511. 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 evening. Flights from Washington, D.C. to Illinois during this time can be as low as $300. Flights in the afternoon are often more expensive with an average ticket price of $530.
What is the cheapest Washington, D.C. to Illinois flight route?
Fly from Baltimore/Washington to Chicago Midway for the best Washington, D.C. - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Washington, D.C. when booking 21 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $340 when searching 21 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Washington, D.C. for as low as $231 on momondo.
What cabin class options are available on Washington, D.C. to Illinois flights?
There are 4 cabin classes available to choose from on Washington, D.C. to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Washington, D.C. to Illinois?
Frontier, Spirit Airlines, and Southwest are the most popular carriers operating from Washington, D.C. to Illinois
What airlines fly to Illinois?
United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Illinois from Washington, D.C. 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 6 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 Washington, D.C. to Illinois on average per day?
103 flights are operational daily from Washington, D.C. to Illinois as of February 2025. The most popular departure time for this route is 5:00PM, with 46% of flights per day taking off at noon.
How many flights depart from Washington, D.C. to Illinois on average per week?
As of February 2025, 723 flights take off from Washington, D.C. and land in Illinois each week. The most common flight departure day for this route is Thu, with 17% of weekly flights taking off on this day.
Cheap Washington, D.C. to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Illinois
When did momondo last update prices for flights from Washington, D.C. to Illinois?
Prices for flights from Washington, D.C. to Illinois were last updated today.
How many operators does momondo search for flights from Washington, D.C. to Illinois?
The number of operators available for flights from Washington, D.C. to Illinois is 6 as of February 2025.
How old do you have to be to fly from Washington, D.C. to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. to Illinois is Boeing 737-800 (12.68% of total bookings). The next most popular plane models are Airbus A320-100/200 (12.34%), Boeing 737 MAX 8 (11.48%), and Airbus A319 (10.75%).
Best airlines flying from Washington, D.C. to Illinois
Compare and see reviews for airlines that fly from Washington, D.C. to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $58 | Free Cancellation | Rating 6.0 3,351 reviews | |||
| PriceFrom $101 | Free Cancellation | Rating 6.3 8,006 reviews | |||
| PriceFrom $133 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $149 | Free Cancellation | Rating 7.4 8,746 reviews | |||
| PriceFrom $158 | Free Cancellation | Rating 8.1 4,385 reviews | |||
| PriceFrom $175 | Free Cancellation | Rating 8.0 8,187 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Washington, D.C. to Illinois?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Illinois for you.
Can I find flights from Washington, D.C. to Illinois with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Illinois from Washington, D.C. with this policy.
How can momondo help me find flights from Washington, D.C. to Illinois?
momondo provides multiple filters to help you find the best flight to Illinois from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Washington, D.C. to Illinois right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Washington, D.C. to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.
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