Cheap flights from Seattle (SEA) to Illinois from $40

Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Illinois. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

Yes, there are multiple flights from Seattle to Illinois for under $200. The cheapest flight booked recently is on Alaska Airlines for just $149, but on average you can expect to pay $175.

Cheapflights has at least 20 direct flights from Seattle to Illinois under $200. A good price for a nonstop flight from Seattle to Illinois is less than $214.

There are currently 20+ open flights from Seattle to Illinois within the next 7 days for less than $200.

Days when nonstop flights are available for this flight are: Sunday, Tuesday, Wednesday, Thursday, Friday, Saturday.

Per day, 14 flights depart from Seattle to Illinois on average.
Morning (6am - Noon) - 43% of flight departures
Afternoon (Noon - 6pm) - 29% of flight departures
Evening (6pm - Midnight) - 29% of flight departures

Airlines like Alaska Airlines, United Airlines, and Frontier fly from Seattle to Illinois in about 4h 08m. The time it takes to get you to your destination can typically vary by up to 5h 37m. The distance between Seattle and Illinois is about 1725 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

The cheapest airlines for a one-way flight from Seattle to Illinois are Spirit Airlines ($40), Delta ($75), and Frontier ($90).

The most popular flight routes from Seattle to Illinois are Seattle/Tacoma Intl - Chicago O'Hare Intl, Seattle/Tacoma Intl - Chicago Midway and Seattle/Tacoma Intl - Lambert-St Louis.

No one likes to see their flight delayed. When booking a flight from Seattle to Illinois consider choosing Royal Jordanian (100%), Scandinavian Airlines (95%) or SWISS (95%) as they are the most reliable in getting you off to your destination on time.

On average you can expect to pay $1,121 for a flight from Seattle to Illinois. The cheapest flight overall is $101 while the most popular route, (Seattle/Tacoma Intl - Chicago O'Hare Intl) is currently priced at $149.

These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport flight would often be abbreviated as a SEA to ORD flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI).

The amount of baggage you can bring on your Seattle to Illinois flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

Yes, Cheapflights allows you to browse and filter Seattle to Illinois flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

Yes. In addition to deals on Seattle to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Illinois.

Yes. Cheapflights offers flight deals from Seattle to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Many airlines flying from Seattle to Illinois offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

Yes, you can often find last-minute deals on Seattle to Illinois flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

The Seattle to Illinois flight deals you see on this page were last updated on 5/28.

The most popular airlines flying from Seattle to Illinois are American Airlines, Alaska Airlines and Delta. Something to consider prior to booking your flight.

Currently, February is the cheapest month in which you can book a flight from Seattle to Illinois (average of $244). Flying from Seattle to Illinois in June is currently the most expensive (average of $326). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.