Cheap flights from Washington, D.C. Dulles Intl Airport to Illinois from $79
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. Dulles Intl Airport to Illinois departing on 8/7. 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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United Airlines flights from Washington, D.C. Dulles Intl Airport to Illinois
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Delta flights from Washington, D.C. Dulles Intl Airport to Illinois
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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport is in January. Flight prices, which tend to average around $299, 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 January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $299.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Illinois is on a Tuesday when prices can be found for as low as $398. Flights from Washington, D.C. Dulles Intl Airport to Illinois on a Sunday will generally be more expensive and average around $510. 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. Dulles Intl Airport 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 $509.
What is the cheapest Washington, D.C. Dulles Intl to Illinois flight route?
Fly from Washington, D.C. Dulles Intl to Chicago O'Hare Intl for the best Washington, D.C. Dulles Intl - 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. Dulles Intl Airport when booking 12 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $326 when searching 12 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Washington, D.C. Dulles Intl Airport for as low as $258 on momondo.
What cabin class options are available on Washington, D.C. Dulles Intl to Illinois flights?
There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl 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. Dulles Intl to Illinois?
United Airlines, Frontier, and Allegiant Air are the most popular carriers operating from Washington, D.C. Dulles Intl to Illinois
What airlines fly to Illinois?
United Airlines, Delta and Frontier are the top three most popular airlines that fly to Illinois from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 91% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 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. Dulles Intl Airport to Illinois on average per day?
As of June 2025, there are 35 flights per day flying from Washington, D.C. Dulles Intl Airport to Illinois. The most common time of day flights depart is 5:00PM, with 57% of flights taking off in the afternoon.
How many flights depart from Washington, D.C. Dulles Intl Airport to Illinois on average per week?
As of June 2025, 248 flights take off from Washington, D.C. Dulles Intl Airport and land in Illinois each week. The most common flight departure day for this route is Wed, with 16% of weekly flights taking off on this day.
Cheap Washington, D.C. Dulles Intl Airport to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Illinois
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Illinois?
Prices for flights from Washington, D.C. Dulles Intl Airport to Illinois refresh daily.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Illinois?
The number of operators available for flights from Washington, D.C. Dulles Intl Airport to Illinois is 4 as of June 2025.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Washington, D.C. Dulles Intl Airport to Illinois is Boeing 737-900, representing 13.54% of all bookings. The subsequent popular models are Boeing 757-200 at 10.02%, Boeing 737-800 at 9.25%, and Airbus A320-100/200 at 9.08%.
Best airlines flying from Washington, D.C. Dulles Intl Airport to Illinois
Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $87 | Free Cancellation | Rating 5.9 3,301 reviews | |||
| PriceFrom $161 | Free Cancellation | Rating 7.4 8,809 reviews | |||
| PriceFrom $176 | Free Cancellation | Rating 8.0 7,965 reviews | |||
| PriceFrom $328 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Washington, D.C. to Illinois?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Illinois. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Washington, D.C. to Illinois with flexible booking policies on momondo?
Flights from Washington, D.C. to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Washington, D.C. to Illinois?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Washington, D.C..
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 offers price alerts on flights to Illinois from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.