HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Oregon

$78+ Cheap flights from Illinois to Oregon

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 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PDX
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Oregon 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 Illinois to Oregon

Keep the following information in mind while searching for Illinois to Oregon flight deals. Data was last updated April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$188
(Cheapflightsfares)

One-way from

$78
(Southwest)

Popular in

December

Cheapest in

September

Average price

$307

Good round-trip deal

$279 or less

Good one-way deal

$144 or less
Provider with most accurate pricing for Chicago (CHI)-Portland flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Portland flights.
Search Deals
From Illinois to Oregon
Search Deals
One-way flight from Illinois to Oregon
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Oregon.
Search Deals
Price to beat on a one-way flight from Illinois to Oregon.
Search Deals

Find flight deals from Illinois to Oregon

Cheapest flights from Illinois to Oregon
Explore the most affordable flight options available from Illinois to Oregon. 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 4/16. 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.
Sat 5/317:30 amORD - BOI
1 stop5h 24mDelta
Sat 6/75:35 amBOI - ORD
1 stop5h 12mDelta
Deal found 4/16$175
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.
Sat 5/311:55 pmMDW - BOI
1 stop7h 39mDelta
Sat 6/75:35 amBOI - MDW
1 stop6h 40mDelta
Deal found 4/16$197
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:00 amORD - BOI
1 stop7h 16mHawaiian Airlines
Wed 5/74:20 pmBOI - ORD
1 stop6h 39mHawaiian Airlines
Deal found 4/16$206
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1611:50 amORD - PDX
1 stop6h 55mMultiple Airlines
Sun 5/185:51 pmPDX - ORD
Nonstop4h 05mMultiple Airlines
Deal found 4/17$225
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.
Sat 5/177:00 amORD - PDX
Nonstop4h 23mAlaska Airlines
Tue 5/205:51 pmPDX - ORD
Nonstop4h 05mAlaska Airlines
Deal found 4/17$227
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/166:00 amSTL - PDX
1 stop6h 24mAmerican Airlines
Fri 5/231:55 pmPDX - STL
1 stop6h 50mAmerican Airlines
Deal found 4/16$227
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/158:03 pmMDW - PDX
1 stop6h 35mFrontier
Sat 5/2412:48 pmPDX - MDW
1 stop6h 05mFrontier
Deal found 4/15$228
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.
Wed 5/147:15 amORD - PDX
1 stop9h 35mDelta
Sun 5/252:00 pmPDX - ORD
1 stop7h 59mDelta
Deal found 4/16$228
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/108:15 pmSTL - PDX
1 stop6h 23mMultiple Airlines
Mon 5/191:25 pmPDX - STL
1 stop8h 39mMultiple Airlines
Deal found 4/16$228
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:30 pmSTL - PDX
2 stops8h 35mUnited Airlines
Sat 11/159:10 amPDX - STL
1 stop5h 16mUnited Airlines
Deal found 4/16$232
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.
Sun 9/216:24 amORD - BOI
1 stop9h 31mAlaska Airlines
Sat 10/112:45 pmBOI - ORD
1 stop8h 14mAlaska Airlines
Deal found 4/16$240
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/27:41 amORD - PDX
1 stop7h 56mSpirit Airlines
Tue 5/67:01 pmPDX - ORD
1 stop13h 54mSpirit Airlines
Deal found 4/16$241

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to Oregon 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 Illinois to Oregon that are best for you.

Fly from

Illinois

Fly to

Oregon

Route

Depart

Return

Price

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Sat 5/31

7:30 am-11:54 am

1 stop5h 24m

Boise Air Term. Gowen Fld

Sat 6/7

5:35 am-11:47 am

1 stop5h 12m

$175

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Sat 5/31

1:55 pm-8:34 pm

1 stop7h 39m

Boise Air Term. Gowen Fld

Sat 6/7

5:35 am-1:15 pm

1 stop6h 40m

$197

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Wed 5/7

6:00 am-12:16 pm

1 stop7h 16m

Boise Air Term. Gowen Fld

Wed 5/7

4:20 pm-11:59 pm

1 stop6h 39m

$206

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Fri 5/16

11:50 am-4:45 pm

1 stop6h 55m

Portland

Sun 5/18

5:51 pm-11:56 pm

Nonstop4h 05m

$225

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 5/17

7:00 am-9:23 am

Nonstop4h 23m

Portland

Tue 5/20

5:51 pm-11:56 pm

Nonstop4h 05m

$227

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Fri 5/16

6:00 am-10:24 am

1 stop6h 24m

Portland

Mon 5/19

3:24 pm-11:51 pm

1 stop6h 27m

$227

ChicagoPortland

MDW - PDX

MDWPDX

Chicago Midway

Thu 5/15

8:03 pm-12:38 am

1 stop6h 35m

Portland

Sat 5/24

12:48 pm-8:53 pm

1 stop6h 05m

$228

St. LouisPortland

STL - PDX

STLPDX

Lambert-St Louis

Sat 5/10

8:15 pm-12:38 am

1 stop6h 23m

Portland

Mon 5/19

1:25 pm-12:04 am

1 stop8h 39m

$228

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Wed 5/14

7:15 am-2:50 pm

1 stop9h 35m

Portland

Sun 5/25

2:00 pm-11:59 pm

1 stop7h 59m

$228

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 5/17

7:00 am-9:23 am

Nonstop4h 23m

Portland

Tue 5/20

1:25 pm-10:23 pm

1 stop6h 58m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Illinois to Oregon

Have a flexible travel schedule? Discover the best time to fly to Oregon from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Oregon

What is the cheapest month to book a flight from Illinois to Oregon?

Currently, November is the cheapest month in which you can book a flight from Illinois to Oregon (average of $277). Flying from Illinois to Oregon in March is currently the most expensive (average of $369). 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 IL to OR?

Find hourly flight availability from Illinois to Oregon. 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 Illinois to Oregon as you normally would.

Weekly flight availability from Illinois to Oregon

Explore weekly flight availability from Illinois to Oregon. 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 USIL to USOR are scheduled on a Thursday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

Rainfall in Oregon by month

Plan your trip to Oregon by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Oregon ranges from 0.7 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Oregon when rainfall is around 0.7 in.

Temperature in Oregon by month

Plan your trip to Oregon by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Oregon, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Oregon

Get insights into the airlines that provide service to Oregon. 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 Oregon. Reviews last updated April 17, 2025.
To help decide which airline to fly from Illinois to Oregon, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,882 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,882 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,382 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,882 reviews

Entertainment

7.1

Boarding

8.2

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

Find useful and relevant information for your journey from Illinois to Oregon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Illinois to Oregon one-way?

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $78. However, be on the lookout for offers from United Airlines and Alaska Airlines, as they are both options that can get you from Illinois to Oregon for a low price.

  • Can I find deals for flights from Illinois to Oregon that include hotel bookings?

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

  • How can I find direct flights from Illinois to Oregon?

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

  • Can I find deals for business class flights from Illinois to Oregon?

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

  • What is the cheapest month to book a flight from Illinois to Oregon?

    Currently, November is the cheapest month in which you can book a flight from Illinois to Oregon (average of $277). Flying from Illinois to Oregon in March is currently the most expensive (average of $369). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Oregon

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Fort Lauderdale flights
LaGuardia to Fort Lauderdale flights
John F Kennedy Intl to Los Angeles flights
Newark to Orlando flights
John F Kennedy Intl to Miami flights
Newark to Los Angeles flights
LaGuardia to Miami flights
Newark to Miami flights
San Francisco to John F Kennedy Intl flights
Los Angeles to John F Kennedy Intl flights
John F Kennedy Intl to Dallas/Fort Worth flights
John F Kennedy Intl to Fort Lauderdale flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to Seattle flights
John F Kennedy Intl to Las Vegas flights
O'Hare Intl to Las Vegas flights
Newark to Las Vegas flights
John F Kennedy Intl to San Francisco flights
LaGuardia to Orlando flights
John F Kennedy Intl to O'Hare Intl flights
Los Angeles to Newark flights
LaGuardia to Dallas/Fort Worth flights
LaGuardia to O'Hare Intl flights
John F Kennedy Intl to Orlando flights
LaGuardia to Atlanta flights
Los Angeles to Boston flights
Dallas/Fort Worth to O'Hare Intl flights
Los Angeles to Honolulu flights
Newark to O'Hare Intl flights
Newark to Seattle flights
O'Hare Intl to Dallas/Fort Worth flights
O'Hare Intl to LaGuardia flights
Dallas/Fort Worth to Las Vegas flights
San Francisco to Newark flights
John F Kennedy Intl to Seattle flights
Newark to Tampa flights
Dallas/Fort Worth to Newark flights
O'Hare Intl to John F Kennedy Intl flights
Los Angeles to Seattle flights
John F Kennedy Intl to West Palm Beach flights
Newark to Dallas/Fort Worth flights
Seattle to Newark flights
Seattle to Los Angeles flights
Los Angeles to LaGuardia flights
LaGuardia to Los Angeles flights
Newark to San Francisco flights
Seattle to Las Vegas flights
Fort Lauderdale to Newark flights
LaGuardia to Hobby flights

Top 8 airlines flying from Illinois to Oregon

Discover the top 8 airlines that operate flights from Illinois to Oregon. 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.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$81Average$137FlexibilityNo cancel feeOn-time65%
FrontierCheapest$108Average$217FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$134Average$289FlexibilityNo cancel feeOn-time85%
DeltaCheapest$176Average$444FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$177Average$474FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$197Average$511FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$215Average$588FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$238Average$433FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.