$101 Find Cheap Flights from Illinois to Washington - Compare and Save

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Washington.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to Washington is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Illinois to Washington with an airline and back with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Illinois to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Illinois and Washington are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (70 flights per week), United Airlines (48 flights per week), and Qatar Airways (48 flights per week).

There are 13 airports in Washington. The busiest airport is Seattle/Tacoma Airport (SEA), with 87% of all flights arriving there.

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Washington is Seattle/Tacoma Intl Airport (SEA), with an average flight price of $214.

Based on KAYAK data, the cheapest day to fly to Washington is Friday where round-trip tickets can be as cheap as $368. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $460 on average.

The cheapest time of day to fly to Washington is generally at night, when round-trip flights cost $376 on average. Morning departures are around 4% cheaper than evening flights, on average. The most expensive time of day to fly to Washington is generally in the evening, which is peak travel time and where the average cost of a ticket is $408.

The cheapest ticket to Washington from Illinois found in the last 5 days was to Seattle, at $263 round-trip. The most popular route is Chicago Midway Airport (MDW) to Seattle (SEA) and the cheapest round-trip airline ticket found on this route in the last 5 days was $263.

The cheapest month for flights from Illinois to Washington is February, when tickets cost $46 (return) on average. On the other hand, the most expensive months are January and April, when the average cost of round-trip tickets is $441 and $359 respectively.

To get a below average price on the flight from Illinois to Washington, you should book around 3 weeks before departure, which saves you about 41% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

From Illinois, there are direct flights to Washington from 1 city. This city is Chicago and there are 521 direct flights each week.

There are around 75 direct flights from within Illinois to Washington every day. Most flights (40%) depart in the afternoon.

Each week there are around 521 direct flights from within Illinois to Washington. The most common day for departures is Sunday, with 17% of flights taking off on this day.

An average nonstop flight from Illinois to Washington takes 8h 19m, covering a distance of 1627 miles. The shortest route is Chicago Midway Airport (MDW) to Spokane (GEG) with an average flight time of 3h 45m.

Each week, there are 515 medium-haul flights (3-6 hour flight duration) and 6 short-haul flights (up to 3 hour flight duration) to Washington. There aren't any long-haul flights (6-12 hour flight duration).

Based on KAYAK flight searches, the most popular destination is Seattle (82% of total searches to Washington). The next most popular destinations are Portland (15%) and Spokane (3%). Searches for flights to Pasco (0%), to Bellingham (0%) and to Pullman (0%) are also popular.