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$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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PDX
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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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 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$201
(United Airlines)

One-way from

$78
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$317

Good round-trip deal

$275 or less

Good one-way deal

$113 or less
Provider with most accurate pricing for Chicago (CHI)-Portland flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Portland flights.
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From Illinois to Oregon
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One-way flight from Illinois to Oregon
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Highest demand for flights based on searches. 5% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Illinois to Oregon.
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Price to beat on a one-way flight from Illinois to Oregon.
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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 30, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 5/298:45 amORD - BOI
Nonstop3h 58mUnited Airlines
Mon 6/22:31 pmBOI - ORD
1 stop9h 28mUnited Airlines
Deal found 4/29$201
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 9/176:20 amORD - BOI
1 stop9h 40mAlaska Airlines
Sun 9/215:45 pmBOI - ORD
1 stop12h 18mAlaska Airlines
Deal found 4/29$210
This Delta deal was found by Cheapflights users on 4/29. 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 5/146:20 pmORD - BOI
1 stop6h 52mDelta
Tue 5/2012:50 pmBOI - ORD
1 stop7h 50mDelta
Deal found 4/29$211
This Southwest deal was found by Cheapflights users on 4/29. 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.
Fri 10/35:25 pmORD - BOI
1 stop8h 15mSouthwest
Mon 10/61:05 pmBOI - ORD
1 stop8h 15mSouthwest
Deal found 4/29$215
This Delta deal was found by Cheapflights users on 4/29. 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 7/239:19 amMDW - BOI
1 stop5h 53mDelta
Sun 8/35:20 amBOI - MDW
1 stop6h 46mDelta
Deal found 4/29$217
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Sat 6/2111:50 amORD - PDX
1 stop7h 54mSpirit Airlines
Fri 7/46:39 pmPDX - ORD
1 stop9h 33mSpirit Airlines
Deal found 4/29$222
This Delta deal was found by Cheapflights users on 4/28. 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 8/235:50 pmMDW - PDX
1 stop7h 14mDelta
Sun 8/3110:55 pmPDX - MDW
1 stop7h 45mDelta
Deal found 4/28$223
This Delta deal was found by Cheapflights users on 4/29. 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 5/314:30 pmORD - PDX
1 stop7h 51mDelta
Wed 6/41:20 pmPDX - ORD
1 stop6h 20mDelta
Deal found 4/29$223
This Southwest deal was found by Cheapflights users on 4/29. 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.
Fri 5/306:10 pmMDW - PDX
1 stop8h 25mSouthwest
Fri 6/62:30 pmPDX - MDW
Nonstop3h 55mSouthwest
Deal found 4/29$224
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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.
Sat 5/177:00 amORD - PDX
Nonstop4h 23mHawaiian Airlines
Sat 5/245:51 pmPDX - ORD
Nonstop4h 05mHawaiian Airlines
Deal found 4/29$224
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/48:14 pmORD - PDX
1 stop21h 28mMultiple Airlines
Sat 5/105:40 pmPDX - ORD
1 stop15h 15mMultiple Airlines
Deal found 4/29$225
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 6/37:00 amORD - PDX
Nonstop4h 23mAlaska Airlines
Wed 6/115:51 pmPDX - ORD
Nonstop4h 05mAlaska Airlines
Deal found 4/29$227

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 30, 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

Thu 5/29

8:45 am-11:43 am

Nonstop3h 58m

Boise Air Term. Gowen Fld

Mon 6/2

2:31 pm-12:59 am

1 stop9h 28m

$201

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

Wed 5/14

6:20 pm-12:12 am

1 stop6h 52m

Boise Air Term. Gowen Fld

Tue 5/20

12:50 pm-9:40 pm

1 stop7h 50m

$211

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

Wed 7/23

7:21 pm-11:59 pm

1 stop5h 38m

Boise Air Term. Gowen Fld

Sun 8/3

5:20 am-1:06 pm

1 stop6h 46m

$217

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 6/21

11:50 am-5:44 pm

1 stop7h 54m

Portland

Tue 7/1

6:39 pm-6:12 am

1 stop9h 33m

$222

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 5/31

4:30 pm-10:21 pm

1 stop7h 51m

Portland

Wed 6/4

1:20 pm-9:40 pm

1 stop6h 20m

$223

ChicagoPortland

MDW - PDX

MDWPDX

Chicago Midway

Fri 5/30

6:10 pm-12:35 am

1 stop8h 25m

Portland

Fri 6/6

2:30 pm-8:25 pm

Nonstop3h 55m

$224

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 5/17

7:00 am-9:23 am

Nonstop4h 23m

Portland

Sat 5/24

5:51 pm-11:56 pm

Nonstop4h 05m

$224

ChicagoPortland

MDW - PDX

MDWPDX

Chicago Midway

Sat 5/24

5:55 pm-10:15 pm

1 stop6h 20m

Portland

Tue 5/27

11:11 pm-8:40 am

1 stop7h 29m

$225

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 5/24

6:00 am-12:17 am

1 stop20h 17m

Portland

Wed 5/28

1:37 pm-8:55 am

2 stops17h 18m

$226

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Tue 6/3

7:00 am-9:23 am

Nonstop4h 23m

Portland

Wed 6/11

5:51 pm-11:56 pm

Nonstop4h 05m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 60 results
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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 $368). 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 30, 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 30, 2025.

The most flights from USIL to USOR are scheduled on a Tuesday (21 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (5 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 30, 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
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,295 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,402 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 United Airlines, with whom users have recently found tickets for as low as $78. However, be on the lookout for offers from Alaska Airlines and Delta, 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 $368). 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

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Alternative routes for Illinois to Oregon

See prices for flight routes from nearby airports that may be better suited for you.
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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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$82Average$139FlexibilityNo cancel feeOn-time65%
FrontierCheapest$108Average$220FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$134Average$289FlexibilityNo cancel feeOn-time85%
DeltaCheapest$176Average$437FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$178Average$467FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$198Average$469FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$218Average$594FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$238Average$429FlexibilityNo cancel feeOn-time63%

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