$78+ Cheap flights from Oregon to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Oregon to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Oregon to Illinois
Keep the following information in mind while searching for Oregon to Illinois flight deals. Data was last updated April 17, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $175 (Delta) |
One-way from | $78 (Southwest) |
Popular in | March |
Cheapest in | January |
Average price | $333 |
Good round-trip deal | $355 or less |
Good one-way deal | $170 or less |
Find flight deals from Oregon to Illinois
Cheapest flights from Oregon to IllinoisExplore the most affordable flight options available from Oregon to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.
Explore the most affordable flight options available from Oregon to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.
This Delta deal was found by Cheapflights users on 4/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This CheapOair deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Flightnetwork deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Alaska Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This CheapOair deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Alaska Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Oregon to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
Use the filters below to find and compare flights from Oregon to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
BoiseChicago
BOI - MDW
BOIMDW
Boise Air Term. Gowen Fld
Wed 7/2
10:24 am-5:40 pm
1 stop6h 16m
Chicago Midway
Mon 7/7
9:20 am-2:00 pm
1 stop5h 40m
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
Thu 7/10
3:25 pm-9:54 pm
1 stop5h 29m
Chicago O'Hare Intl
Mon 7/14
6:00 am-12:31 pm
1 stop7h 31m
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
Thu 9/11
2:11 pm-11:15 pm
1 stop8h 04m
Chicago O'Hare Intl
Tue 9/16
7:50 pm-11:06 pm
Nonstop4h 16m
PortlandChicago
PDX - ORD
PDXORD
Portland
Mon 5/5
6:20 am-11:41 pm
1 stop15h 21m
Chicago O'Hare Intl
Wed 5/7
11:50 am-4:45 pm
1 stop6h 55m
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
Tue 5/6
4:20 pm-11:59 pm
1 stop6h 39m
Chicago O'Hare Intl
Wed 5/7
3:44 pm-10:39 pm
1 stop7h 55m
PortlandChicago
PDX - ORD
PDXORD
Portland
Sat 6/21
6:39 pm-10:50 am
1 stop14h 11m
Chicago O'Hare Intl
Wed 6/25
9:35 pm-11:17 am
1 stop15h 42m
BoiseChicago
BOI - MDW
BOIMDW
Boise Air Term. Gowen Fld
Sun 6/8
3:35 pm-8:00 pm
Nonstop3h 25m
Chicago Midway
Sat 6/14
7:50 am-10:30 am
Nonstop3h 40m
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
Tue 5/6
7:45 am-6:01 pm
1 stop9h 16m
Chicago O'Hare Intl
Thu 5/8
9:02 pm-11:21 am
1 stop15h 19m
PortlandSt. Louis
PDX - STL
PDXSTL
Portland
Tue 5/27
5:30 am-1:34 pm
1 stop6h 04m
Lambert-St Louis
Tue 6/3
7:19 pm-11:43 pm
1 stop6h 24m
BoiseChicago
BOI - ORD
BOIORD
Boise Air Term. Gowen Fld
Fri 5/9
12:16 pm-6:42 am
2 stops17h 26m
Chicago O'Hare Intl
Sun 5/11
8:37 am-11:21 am
2 stops27h 44m
Best time to book a flight from Oregon to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Oregon with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Oregon to Illinois
What is the cheapest month to book a flight from Oregon to Illinois?
Currently, August is the cheapest month in which you can book a flight from Oregon to Illinois (average of $245). Flying from Oregon to Illinois in March is currently the most expensive (average of $321). 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.
What is the cheapest time of day to fly from OR to IL?
Find hourly flight availability from Oregon to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oregon to Illinois as you normally would.
Weekly flight availability from Oregon to Illinois
Explore weekly flight availability from Oregon to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 17, 2025.
The most flights from USOR to USIL are scheduled on a Thursday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated April 17, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Oregon to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Comfort
Entertainment
Boarding
Overall
Crew
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Comfort
Entertainment
Boarding
Overall
Crew
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Comfort
Entertainment
Boarding
Overall
Crew
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Comfort
Entertainment
Boarding
Overall
Crew
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Comfort
Entertainment
Boarding
Overall
Crew
Reviews
Anonymous,Apr 2025
LAS - STS
Food
Comfort
Entertainment
Boarding
Overall
Crew
Reviews
Anonymous,Apr 2025
LAS - STS
Related info for your journey
Find useful and relevant information for your journey from Oregon to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Oregon to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 8 airlines flying from Oregon to Illinois
Discover the top 8 airlines that operate flights from Oregon to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$82 | Average$134 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$108 | Average$258 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$123 | Average$405 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$184 | Average$484 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$192 | Average$482 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$202 | Average$379 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$212 | Average$528 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$253 | Average$459 | FlexibilityNo cancel fee | On-time63% |