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$91+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PDX
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$190
(Cheapflightsfares)

One-way from

$91
(Delta)

Popular in

December

Cheapest in

September

Average price

$313

Good round-trip deal

$269 or less

Good one-way deal

$124 or less
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 ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
dom. 9/283:21 pmORD - BOI
1 stop6h 23mSpirit Airlines
vie. 10/39:49 pmBOI - ORD
1 stop15h 27mSpirit Airlines
Deal found 6/11$190
This Delta deal was found by Cheapflights users on 6/10. 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.
mié. 8/209:15 amMDW - BOI
1 stop5h 46mDelta
mié. 10/221:43 pmBOI - MDW
1 stop7h 01mDelta
Deal found 6/10$195
This Delta deal was found by Cheapflights users on 6/10. 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.
mar. 7/87:20 pmORD - BOI
1 stop5h 49mDelta
mar. 7/1512:50 pmBOI - ORD
1 stop8h 18mDelta
Deal found 6/10$195
This Southwest deal was found by Cheapflights users on 6/11. 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.
lun. 9/18:50 pmMDW - PDX
Nonstop4h 15mSouthwest
vie. 9/512:35 pmPDX - MDW
1 stop9h 15mSouthwest
Deal found 6/11$217
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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.
jue. 9/182:07 pmORD - PDX
Nonstop4h 29mHawaiian Airlines
lun. 9/228:37 pmPDX - ORD
1 stop8h 26mHawaiian Airlines
Deal found 6/11$217
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
mié. 6/259:15 pmORD - PDX
1 stop16h 02mSpirit Airlines
mar. 7/16:39 pmPDX - ORD
1 stop14h 11mSpirit Airlines
Deal found 6/10$218
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
mar. 10/76:00 amORD - RDM
1 stop14h 56mAlaska Airlines
sáb. 10/113:40 pmRDM - ORD
1 stop6h 19mAlaska Airlines
Deal found 6/10$222
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 10/156:00 amORD - EUG
1 stop17h 29mAlaska Airlines
lun. 10/205:42 pmEUG - ORD
1 stop10h 39mAlaska Airlines
Deal found 6/10$224
This Hawaiian Airlines deal was found by Cheapflights users on 6/11. 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.
jue. 9/186:20 amORD - BOI
1 stop9h 40mHawaiian Airlines
mar. 9/236:35 amBOI - ORD
1 stop9h 14mHawaiian Airlines
Deal found 6/11$225
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
mar. 7/292:03 pmORD - PDX
Nonstop4h 32mAlaska Airlines
sáb. 8/25:35 pmPDX - ORD
Nonstop4h 04mAlaska Airlines
Deal found 6/10$227
This Trip.com deal was found by Cheapflights users on 6/11. 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.
sáb. 7/267:00 amORD - EUG
1 stop6h 42mHawaiian Airlines
sáb. 8/212:45 pmEUG - ORD
1 stop8h 54mHawaiian Airlines
Deal found 6/11$228
This Orbitz deal was found by Cheapflights users on 6/12. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/57:00 amORD - PDX
Nonstop4h 25mMultiple Airlines
mar. 7/86:39 pmPDX - ORD
1 stop9h 24mMultiple Airlines
Deal found 6/12$230

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 junio 12, 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

jue. 9/4

3:21 pm-8:44 pm

1 stop6h 23m

Boise Air Term. Gowen Fld

dom. 9/7

9:49 pm-2:16 pm

1 stop15h 27m

$191

ChicagoBoise

MDW - BOI

MDWBOI

Chicago Midway

mié. 8/20

9:15 am-2:01 pm

1 stop5h 46m

Boise Air Term. Gowen Fld

mié. 10/22

1:43 pm-9:44 pm

1 stop7h 01m

$195

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

mar. 7/8

7:20 pm-12:09 am

1 stop5h 49m

Boise Air Term. Gowen Fld

mar. 7/15

12:50 pm-10:08 pm

1 stop8h 18m

$195

ChicagoPortland

MDW - PDX

MDWPDX

Chicago Midway

lun. 9/1

8:50 pm-11:05 pm

Nonstop4h 15m

Portland

vie. 9/5

12:35 pm-11:50 pm

1 stop9h 15m

$217

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

sáb. 7/26

7:00 am-9:25 am

Nonstop4h 25m

Portland

mar. 8/12

5:35 pm-11:39 pm

Nonstop4h 04m

$217

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

mié. 6/25

9:15 pm-11:17 am

1 stop16h 02m

Portland

mar. 7/1

6:39 pm-10:50 am

1 stop14h 11m

$218

ChicagoRedmond

ORD - RDM

ORDRDM

Chicago O'Hare Intl

mar. 10/7

6:00 am-6:56 pm

1 stop14h 56m

Bend/Redmond

sáb. 10/11

3:40 pm-11:59 pm

1 stop6h 19m

$222

ChicagoEugene

ORD - EUG

ORDEUG

Chicago O'Hare Intl

mié. 10/15

6:00 am-9:29 pm

1 stop17h 29m

Eugene

lun. 10/20

5:42 pm-6:21 am

1 stop10h 39m

$224

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

mié. 8/27

7:45 am-12:12 pm

1 stop6h 27m

Portland

sáb. 8/30

12:46 am-8:24 am

1 stop5h 38m

$225

ChicagoBoise

ORD - BOI

ORDBOI

Chicago O'Hare Intl

lun. 8/11

8:00 am-4:10 pm

1 stop9h 10m

Boise Air Term. Gowen Fld

mar. 8/19

4:00 pm-11:39 pm

1 stop6h 39m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 junio 12, 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 junio 12, 2025.

The most flights from USIL to USOR are scheduled on a Wednesday (25 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (16 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 junio 12, 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
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Comfort

7.8

Food

7.1

Overall

8.0

Entertainment

7.1

Crew

8.5

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 Delta, with whom users have recently found tickets for as low as $91. However, be on the lookout for offers from Spirit Airlines and Southwest, 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$91Average$143FlexibilityNo cancel feeOn-time65%
FrontierCheapest$108Average$183FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$143Average$353FlexibilityNo cancel feeOn-time85%
DeltaCheapest$176Average$419FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$179Average$446FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$222Average$579FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$227Average$455FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$237Average$444FlexibilityNo cancel feeOn-time63%

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