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 6/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Washington, D.C. to Illinois
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Spirit Airlines flights from Washington, D.C. to Illinois
Our best Spirit Airlines deals on Washington, D.C. to Illinois flight tickets
American Airlines flights from Washington, D.C. to Illinois
Our best American Airlines deals on Washington, D.C. to Illinois flight tickets
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
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 $402. Flights from Washington, D.C. to Illinois on a Monday will generally be more expensive and average around $519. 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 $299. Flights in the afternoon are often more expensive with an average ticket price of $534.
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 6 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $334 when searching 6 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 $266 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 American Airlines 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 49% 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?
107 flights are operational daily from Washington, D.C. to Illinois as of April 2025. The most popular departure time for this route is 5:00PM, with 49% of flights per day taking off at noon.
How many flights depart from Washington, D.C. to Illinois on average per week?
As of April 2025, 751 flights take off from Washington, D.C. and land in Illinois each week. The most common flight departure day for this route is Fri, 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 April 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 MAX 8 (11.61% of total bookings). The next most popular plane models are Boeing 737-800 (11.47%), Airbus A320-100/200 (11.11%), and Airbus A319 (10.77%).
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 $56 | Free Cancellation | Rating 6.3 7,941 reviews | |||
| PriceFrom $58 | Free Cancellation | Rating 5.9 3,283 reviews | |||
| PriceFrom $99 | Free Cancellation | Rating 8.0 7,919 reviews | |||
| PriceFrom $144 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $154 | Free Cancellation | Rating 7.4 8,685 reviews | |||
| PriceFrom $167 | Free Cancellation | Rating 8.0 4,287 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.