How to find the cheapest flight from
Washington to Illinois
How far in advance should I book a flight from Washington to Illinois?
Travelers have found it’s best to book a flight 37 days in advance to save up to 10% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 37 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Washington to Illinois 1-2 weeks in advance for as low as $177, or $177 for flights within the next 24 hours.
One-way flights to Illinois from Washington
The cheapest one-way flights from Washington to Illinois
6:30 pm - 4:53 am
Sun Country Air
4:14 pm - 3:11 pm
Related info for your journey
Useful info, stats and facts about Washington to Illinois flights.
Destination information for Illinois
Things to know before you go. Useful info for your trip from Washington to Illinois
Deer Harbor (DHB)
Eastsound Orcas Island (ESD)