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.

$93 CHEAP FLIGHTS from Illinois to Portland

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals

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, Sep 9 - Sat, Sep 12

12:17 pm - 11:36 amSTL Lambert-St Louis-PDX Portland

25h 19m1 stop Las Vegas Harry Reid Intl

12:24 pm - 11:17 amPDX Portland-STL Lambert-St Louis

20h 53m1 stop Las Vegas Harry Reid Intl

$182Frontier

Thu, Oct 8 - Sun, Oct 11

5:19 pm - 8:39 pmSTL Lambert-St Louis-PDX Portland

29h 20m1 stop Las Vegas Harry Reid Intl

9:34 pm - 1:17 amPDX Portland-STL Lambert-St Louis

25h 43m1 stop Las Vegas Harry Reid Intl

$207Frontier

Tue, Sep 15 - Wed, Sep 16

5:30 pm - 10:52 pmSTL Lambert-St Louis-PDX Portland

7h 22m1 stop Chicago O'Hare Intl

9:00 am - 6:38 pmPDX Portland-STL Lambert-St Louis

7h 38m1 stop San Francisco

$224United Airlines

Sat, Sep 26 - Sat, Oct 3

10:14 am - 4:54 pmSTL Lambert-St Louis-PDX Portland

8h 40m1 stop Dallas/Fort Worth

11:08 pm - 10:18 amPDX Portland-STL Lambert-St Louis

9h 10m1 stop Chicago O'Hare Intl

$228American Airlines

Sat, Sep 5 - Wed, Sep 9

4:40 pm - 9:05 pmSTL Lambert-St Louis-PDX Portland

6h 25m1 stop Denver Intl

8:40 am - 4:34 pmPDX Portland-STL Lambert-St Louis

5h 54m1 stop Denver Intl

$229United Airlines

Wed, Oct 21 - Sat, Oct 24

8:03 am - 1:39 pmSTL Lambert-St Louis-PDX Portland

7h 36m1 stop Phoenix Sky Harbor Intl

1:12 pm - 12:19 amPDX Portland-STL Lambert-St Louis

9h 07m1 stop Chicago O'Hare Intl

$229American Airlines

Mon, Sep 28 - Thu, Oct 1

6:05 pm - 11:45 pmSTL Lambert-St Louis-PDX Portland

7h 40m1 stop Denver Intl

11:35 pm - 9:00 amPDX Portland-STL Lambert-St Louis

7h 25m1 stop Chicago Midway

$229Southwest

Mon, Aug 31 - Mon, Aug 31

2:20 pm - 8:45 pmSTL Lambert-St Louis-PDX Portland

8h 25m1 stop Chicago Midway

10:45 pm - 10:05 amPDX Portland-STL Lambert-St Louis

9h 20m1 stop Baltimore/Washington

$229Southwest

Tue, Sep 1 - Sat, Sep 12

11:13 am - 5:34 pmSTL Lambert-St Louis-PDX Portland

8h 21m1 stop Minneapolis St Paul

6:00 am - 4:47 pmPDX Portland-STL Lambert-St Louis

8h 47m1 stop Minneapolis St Paul

$229Delta

Tue, Sep 1 - Sat, Sep 5

5:00 pm - 10:38 pmSTL Lambert-St Louis-PDX Portland

7h 38m1 stop Salt Lake City

11:55 am - 10:03 pmPDX Portland-STL Lambert-St Louis

8h 08m1 stop Minneapolis St Paul

$229Delta

Recent last minute flight deals from Illinois to Portland

Mon, Aug 17 - Sat, Aug 29

9:57 pm - 5:11 pmORD Chicago O'Hare Intl-PDX Portland

21h 14m1 stop Denver Intl

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

10h 03m1 stop Los Angeles

$321Frontier

Mon, Aug 17 - Mon, Aug 31

8:08 pm - 5:11 pmSTL Lambert-St Louis-PDX Portland

23h 03m1 stop Denver Intl

6:17 pm - 5:50 pmPDX Portland-STL Lambert-St Louis

21h 33m1 stop Las Vegas Harry Reid Intl

$329Frontier

Sat, Aug 15 - Sat, Aug 22

7:20 am - 9:45 amORD Chicago O'Hare Intl-PDX Portland

4h 25mnonstop

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

10h 03m1 stop Los Angeles

$384Multiple Airlines

Mon, Aug 17 - Sat, Aug 29

7:20 am - 9:45 amORD Chicago O'Hare Intl-PDX Portland

4h 25mnonstop

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

10h 03m1 stop Los Angeles

$391Multiple Airlines

Mon, Aug 17 - Mon, Aug 31

3:45 pm - 11:05 pmSTL Lambert-St Louis-PDX Portland

9h 20m2 stops Austin Bergstrom Las Vegas Harry Reid Intl

11:30 pm - 9:35 amPDX Portland-STL Lambert-St Louis

8h 05m1 stop Chicago Midway

$426Southwest

Sat, Aug 15 - Sat, Aug 22

10:15 am - 12:30 pmMDW Chicago Midway-PDX Portland

4h 15mnonstop

11:30 pm - 5:25 amPDX Portland-MDW Chicago Midway

3h 55mnonstop

$437Southwest

Sat, Aug 15 - Sat, Aug 22

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

4h 38mnonstop

2:27 pm - 8:40 pmPDX Portland-ORD Chicago O'Hare Intl

4h 13mnonstop

$437United Airlines

Tue, Aug 18 - Tue, Aug 25

2:12 pm - 4:47 pmORD Chicago O'Hare Intl-PDX Portland

4h 35mnonstop

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

4h 20mnonstop

$437Alaska Airlines

Sat, Aug 15 - Sat, Aug 22

3:35 pm - 10:52 pmPIA Greater Peoria-PDX Portland

9h 17m1 stop Chicago O'Hare Intl

11:02 pm - 10:06 amPDX Portland-PIA Greater Peoria

9h 04m1 stop Chicago O'Hare Intl

$445United Airlines

Tue, Aug 18 - Tue, Aug 25

5:42 pm - 11:59 pmORD Chicago O'Hare Intl-PDX Portland

8h 17m1 stop Seattle/Tacoma Intl

5:41 pm - 6:20 amPDX Portland-ORD Chicago O'Hare Intl

10h 39m1 stop Seattle/Tacoma Intl

$457Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$93

Best time to beat the crowds with an average 20% drop in price.

Most popular time to fly with an average 17% 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

Stevenson

Clackamas

Lake Oswego

Carson

Government Camp

Kelso

Gleneden Beach

Gladstone

Oceanside

Dundee

Durham

Everything you need to know for your flight to Portland

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Portland

Portland (PDX)

PDX

$93 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

Good to know

Low season

High season

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

Flights to other popular destinations

Flights from domestic origins to Portland

Choose which airport to fly into in Portland

Find deals for your return flight