How does KAYAK find such low prices on flights from Illinois to Portland?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Portland.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Portland?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to Portland?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Portland with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Portland?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portland from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$142 CHEAP FLIGHTS from Illinois to Portland

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Cheap Flights from Illinois to Portland

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to Portland

Wed, Oct 21 - Sat, Oct 24

7:02 am - 4:29 pmSTL Lambert-St Louis-PDX Portland

11h 27m2 stops Seattle/Tacoma Intl Sacramento Intl

10:30 am - 11:59 pmPDX Portland-STL Lambert-St Louis

11h 29m2 stops Sacramento Intl Seattle/Tacoma Intl

$273Alaska Airlines

Sat, Oct 24 - Sun, Nov 1

7:42 pm - 10:54 amSTL Lambert-St Louis-PDX Portland

17h 12m1 stop Denver Intl

12:31 pm - 12:33 pmPDX Portland-STL Lambert-St Louis

22h 02m1 stop Las Vegas Harry Reid Intl

$280Frontier

Sat, Oct 24 - Sun, Nov 1

7:42 pm - 10:54 amSTL Lambert-St Louis-PDX Portland

17h 12m1 stop Denver Intl

12:31 pm - 12:33 pmPDX Portland-STL Lambert-St Louis

22h 02m1 stop Las Vegas Harry Reid Intl

$280Frontier

Tue, Oct 20 - Sat, Oct 24

4:38 pm - 11:39 pmMLI Moline Quad-City-PDX Portland

9h 01m1 stop Dallas/Fort Worth

5:20 am - 4:04 pmPDX Portland-MLI Moline Quad-City

8h 44m1 stop Dallas/Fort Worth

$301American Airlines

Wed, Oct 14 - Sat, Oct 17

4:38 pm - 11:39 pmMLI Moline Quad-City-PDX Portland

9h 01m1 stop Dallas/Fort Worth

6:01 am - 4:33 pmPDX Portland-MLI Moline Quad-City

8h 32m1 stop Chicago O'Hare Intl

$301American Airlines

Wed, Nov 18 - Sat, Nov 21

8:13 am - 3:20 pmMLI Moline Quad-City-PDX Portland

9h 07m1 stop Chicago O'Hare Intl

11:30 pm - 10:05 amPDX Portland-MLI Moline Quad-City

8h 35m1 stop Chicago O'Hare Intl

$301United Airlines

Wed, Nov 18 - Sat, Nov 21

6:30 am - 1:22 pmMLI Moline Quad-City-PDX Portland

8h 52m2 stops Chicago O'Hare Intl Denver Intl

11:30 pm - 10:05 amPDX Portland-MLI Moline Quad-City

8h 35m1 stop Chicago O'Hare Intl

$306United Airlines

Tue, Sep 29 - Mon, Oct 5

7:20 am - 1:48 pmORD Chicago O'Hare Intl-PDX Portland

8h 28m1 stop San Diego

12:39 pm - 5:38 amPDX Portland-ORD Chicago O'Hare Intl

14h 59m1 stop Las Vegas Harry Reid Intl

$306Multiple Airlines

Sat, Oct 17 - Mon, Oct 26

2:21 pm - 8:40 pmORD Chicago O'Hare Intl-PDX Portland

8h 19m1 stop San Diego

12:25 pm - 5:16 amPDX Portland-ORD Chicago O'Hare Intl

14h 51m1 stop Las Vegas Harry Reid Intl

$306Multiple Airlines

Tue, Nov 3 - Tue, Nov 3

2:07 pm - 4:50 pmORD Chicago O'Hare Intl-PDX Portland

4h 43mnonstop

7:35 pm - 5:40 amPDX Portland-ORD Chicago O'Hare Intl

8h 05m1 stop Seattle/Tacoma Intl

$321Alaska Airlines

Recent last minute flight deals from Illinois to Portland

Tue, Sep 1 - Thu, Oct 1

2:41 pm - 5:11 pmORD Chicago O'Hare Intl-PDX Portland

28h 30m1 stop Denver Intl

12:38 pm - 12:23 amPDX Portland-ORD Chicago O'Hare Intl

9h 45m1 stop Denver Intl

$318Frontier

Tue, Sep 1 - Thu, Oct 1

2:41 pm - 5:11 pmORD Chicago O'Hare Intl-PDX Portland

28h 30m1 stop Denver Intl

12:38 pm - 12:23 amPDX Portland-ORD Chicago O'Hare Intl

9h 45m1 stop Denver Intl

$339Frontier

Thu, Sep 3 - Sat, Sep 5

2:22 pm - 4:50 pmORD Chicago O'Hare Intl-PDX Portland

4h 28mnonstop

5:56 pm - 5:59 amPDX Portland-ORD Chicago O'Hare Intl

10h 03m1 stop Los Angeles Los Angeles

$384Multiple Airlines

Tue, Sep 1 - Thu, Oct 1

2:41 pm - 5:11 pmORD Chicago O'Hare Intl-PDX Portland

28h 30m1 stop Denver Intl

7:06 am - 1:26 pmPDX Portland-ORD Chicago O'Hare Intl

4h 20mnonstop

$391Multiple Airlines

Sat, Sep 5 - Tue, Sep 22

3:25 pm - 6:00 pmORD Chicago O'Hare Intl-PDX Portland

4h 35mnonstop

11:08 pm - 5:08 amPDX Portland-ORD Chicago O'Hare Intl

4h 00mnonstop

$393American Airlines

Sat, Sep 5 - Tue, Sep 22

9:29 pm - 11:58 pmORD Chicago O'Hare Intl-PDX Portland

4h 29mnonstop

6:00 am - 4:00 pmPDX Portland-ORD Chicago O'Hare Intl

8h 00m1 stop Dallas/Fort Worth

$403American Airlines

Tue, Sep 1 - Thu, Oct 1

8:50 am - 11:28 amORD Chicago O'Hare Intl-PDX Portland

4h 38mnonstop

8:30 am - 2:43 pmPDX Portland-ORD Chicago O'Hare Intl

4h 13mnonstop

$407United Airlines

Tue, Sep 1 - Thu, Oct 1

7:00 am - 9:29 amORD Chicago O'Hare Intl-PDX Portland

4h 29mnonstop

10:43 am - 4:58 pmPDX Portland-ORD Chicago O'Hare Intl

4h 15mnonstop

$407United Airlines

Tue, Sep 1 - Thu, Oct 1

8:55 pm - 11:10 pmMDW Chicago Midway-PDX Portland

4h 15mnonstop

5:20 am - 11:10 amPDX Portland-MDW Chicago Midway

3h 50mnonstop

$407Southwest

Tue, Sep 1 - Thu, Oct 1

8:55 pm - 11:10 pmMDW Chicago Midway-PDX Portland

4h 15mnonstop

9:15 pm - 5:45 amPDX Portland-MDW Chicago Midway

6h 30m1 stop Phoenix Sky Harbor Intl

$417Southwest

Useful Info

Low season	January
High season	July
Cheapest flight	$142

Best time to beat the crowds with an average 23% drop in price.

Most popular time to fly with an average 15% increase in price.

Flight from St. Louis to Portland

How does KAYAK find such low prices on flights from Illinois to Portland?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Portland.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Portland?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Portland?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Portland with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Portland?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portland from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Seaside

Vancouver

Salem

The Dalles

Clackamas

Stevenson

Lake Oswego

Carson

Government Camp

Kelso

Gleneden Beach

Gladstone

Oceanside

Dundee

Durham

Everything you need to know for your flight to Portland

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Information on the airport you'll fly into in Portland

Portland (PDX)

PDX

$142 Find Cheap Flights from Illinois to Portland - Compare and Save

Cheap Flights from Illinois to Portland

Recent round-trip flight deals from Illinois to Portland

Recent one-way flight deals from Illinois to Portland

Recent last minute flight deals from Illinois to Portland

Recent direct flight deals from Illinois to Portland

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Cheapest flight

FAQs for booking flights from Illinois to Portland

Traveling to a place near Portland?

Everything you need to know for your flight to Portland

Information on the airport you'll fly into in Portland

Cabin class types available on flights to Illinois

Complete your trip to Portland with a hotel stay or car rental

Find direct flights for Portland

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Choose which airport to fly into in Portland

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