Cheap flights from Oregon to Illinois from $85
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Oregon to Illinois departing on 7/1. 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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How to get the cheapest flight ticket from Oregon 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 Oregon is in January. Flight prices, which tend to average around $263, 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 August is also cheap. Prices for this month can be found on momondo for an average of $278.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Oregon to Illinois is on a Friday when prices can be found for as low as $458. Flights from Oregon to Illinois on a Sunday will generally be more expensive and average around $587. 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 afternoon. Flights from Oregon to Illinois during this time can be as low as $311. Flights in the morning are often more expensive with an average ticket price of $529.
What is the cheapest Oregon to Illinois flight route?
Fly from Portland to Chicago O'Hare Intl for the best Oregon - 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 Oregon when booking 21 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $358 when searching 21 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Oregon for as low as $304 on momondo.
What cabin class options are available on Oregon to Illinois flights?
There are 4 cabin classes available to choose from on Oregon 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 Oregon to Illinois?
Spirit Airlines, United Airlines, and Southwest are the most popular carriers operating from Oregon to Illinois
What airlines fly to Illinois?
United Airlines, Alaska Airlines and American Airlines are the top three most popular airlines that fly to Illinois from Oregon according to our data. United Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 8 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 Oregon to Illinois on average per day?
The number of flights available between Oregon and Illinois is 37 per day as of June 2025. The most frequent departure time is 7:00AM, with 60% of daily flights leaving at noon.
How many flights depart from Oregon to Illinois on average per week?
The number of flights available between Oregon and Illinois is 260 per week as of June 2025. The most frequent departure day is Thu, with 17% of weekly flights leaving on this day.
Cheap Oregon to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Oregon to Illinois
When did momondo last update prices for flights from Oregon to Illinois?
Prices for flights from Oregon to Illinois are updated daily.
How many operators does momondo search for flights from Oregon to Illinois?
The number of operators available for flights from Oregon to Illinois is 8 as of June 2025.
How old do you have to be to fly from Oregon to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Oregon to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Oregon to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Oregon to Illinois is Boeing 737 MAX 9 (13.26% of total bookings). The next most popular plane models are Boeing 737-900 (12.84%), Boeing 737-800 (11.75%), and Airbus A320-100/200 (10.90%).
Best airlines flying from Oregon to Illinois
Compare and see reviews for airlines that fly from Oregon to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $86 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $108 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $123 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $186 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $202 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $204 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $217 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $253 | Free Cancellation | Rating 8.0 4,287 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Oregon to Illinois?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Oregon to Illinois. momondo saves you time and could save you money on your trip.
Can I find flights from Oregon to Illinois with flexible booking policies on momondo?
Flights from Oregon 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 Oregon to Illinois?
Once you have performed a search for Oregon to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Oregon to Illinois right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Illinois from Oregon. 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.