HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portland

$133+ Cheap flights from Chicago (CHI) to Portland, ME (PWM)

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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — PWM
May 17 — May 241
Sun 5/17
Sun 5/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Chicago to Portland 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.
Cheapflights Tip: The best prices from Chicago to Portland are usually found in September or May, booked 40 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Chicago to Portland

Cheapest flights from Chicago to Portland
Explore the most affordable flight options available from Chicago to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2026.

This American Airlines deal was found by Cheapflights users on 4/14. 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.
Thu 6/118:54 pm
ORD
-
PWM
Nonstop2h 43m
American Airlines
Mon 6/157:23 pm
PWM
-
ORD
Nonstop3h 09m
American Airlines
Deal found 4/14$269
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:55 pm
MDW
-
PWM
Nonstop2h 15m
Southwest
Fri 7/177:40 am
PWM
-
MDW
Nonstop2h 35m
Southwest
Deal found 4/16$269
This American Airlines deal was found by Cheapflights users on 4/14. 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.
Sat 5/303:15 pm
ORD
-
PWM
Nonstop2h 34m
American Airlines
Sat 6/67:23 pm
PWM
-
ORD
Nonstop3h 09m
American Airlines
Deal found 4/14$272
This American Airlines deal was found by Cheapflights users on 4/14. 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.
Tue 8/43:16 pm
ORD
-
PWM
Nonstop2h 44m
American Airlines
Sat 8/86:15 am
PWM
-
ORD
Nonstop3h 01m
American Airlines
Deal found 4/14$278
This Southwest deal was found by Cheapflights users on 4/13. 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.
Thu 6/45:20 pm
MDW
-
PWM
1 stop5h 45m
Southwest
Mon 6/87:40 am
PWM
-
MDW
Nonstop2h 35m
Southwest
Deal found 4/13$279
This Southwest deal was found by Cheapflights users on 4/13. 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.
Tue 9/18:40 am
MDW
-
PWM
2 stops7h 35m
Southwest
Fri 9/47:40 am
PWM
-
MDW
Nonstop2h 30m
Southwest
Deal found 4/13$284
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:30 am
MDW
-
PWM
1 stop8h 05m
Southwest
Mon 8/177:40 am
PWM
-
MDW
Nonstop2h 30m
Southwest
Deal found 4/16$285
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.
Tue 6/98:54 pm
ORD
-
PWM
Nonstop2h 43m
American Airlines
Sat 6/137:23 pm
PWM
-
ORD
Nonstop3h 09m
American Airlines
Deal found 4/16$287
This American Airlines deal was found by Cheapflights users on 4/14. 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.
Thu 6/258:54 pm
ORD
-
PWM
Nonstop2h 43m
American Airlines
Sat 6/276:54 pm
PWM
-
ORD
1 stop5h 25m
American Airlines
Deal found 4/14$288
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.
Tue 6/26:30 pm
ORD
-
PWM
1 stop5h 13m
Delta
Wed 6/106:57 pm
PWM
-
ORD
1 stop6h 02m
Delta
Deal found 4/16$289
This Southwest deal was found by Cheapflights users on 4/14. 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.
Mon 8/176:10 pm
MDW
-
PWM
Nonstop2h 20m
Southwest
Wed 8/1910:30 am
PWM
-
MDW
2 stops9h 35m
Southwest
Deal found 4/14$290
This Southwest deal was found by Cheapflights users on 4/13. 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.
Tue 6/25:00 pm
MDW
-
PWM
1 stop4h 35m
Southwest
Wed 6/107:30 am
PWM
-
MDW
Nonstop2h 35m
Southwest
Deal found 4/13$293

Find flight deals from Chicago to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Portland (PWM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$269
(American Airlines)

One-way from

$133
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$394

Good round-trip deal

$308 or less

Good one-way deal

$174 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 Chicago (CHI) to Portland
Search Deals
One-way flight from Chicago (CHI) to Portland
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Chicago (CHI) to Portland.
Search Deals
Price to beat on a one-way flight from Chicago (CHI) to Portland.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago to Portland 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, 2026.
Use the filters below to find and compare flights from Chicago to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Fri 6/26

6:12 pm-11:51 pm

1 stop4h 39m

Portland

Mon 6/29

6:00 am-8:00 am

Nonstop3h 00m

$279
Quickest round-trip

ChicagoPortland

MDW - PWM

MDWPWM

Chicago Midway

Thu 6/4

7:00 pm-12:05 am

1 stop4h 05m

Portland

Sun 6/7

6:45 am-8:20 am

Nonstop2h 35m

$279

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Mon 9/14

5:00 pm-11:31 pm

1 stop5h 31m

Portland

Sun 9/20

6:00 am-7:55 am

Nonstop2h 55m

$279

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Thu 5/28

6:18 pm-9:51 pm

Nonstop2h 33m

Portland

Sun 6/7

5:15 am-9:36 am

1 stop5h 21m

$279

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Mon 6/22

3:22 pm-11:15 pm

1 stop6h 53m

Portland

Tue 6/30

5:41 pm-10:48 pm

1 stop6h 07m

$289

ChicagoPortland

MDW - PWM

MDWPWM

Chicago Midway

Sun 5/10

6:23 am-1:10 pm

1 stop5h 47m

Portland

Wed 5/13

12:50 pm-6:33 pm

1 stop6h 43m

$289

ChicagoPortland

MDW - PWM

MDWPWM

Chicago Midway

Wed 5/13

5:00 pm-10:35 pm

1 stop4h 35m

Portland

Wed 5/20

1:00 pm-7:30 pm

1 stop7h 30m

$289

ChicagoPortland

MDW - PWM

MDWPWM

Chicago Midway

Tue 5/5

12:52 pm-12:46 am

2 stops10h 54m

Portland

Sat 5/9

2:05 pm-9:09 pm

1 stop8h 04m

$294

ChicagoPortland

MDW - PWM

MDWPWM

Chicago Midway

Sat 5/30

5:25 pm-11:10 pm

1 stop4h 45m

Portland

Sun 6/7

6:45 am-8:20 am

Nonstop2h 35m

$299

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Tue 8/4

1:44 pm-11:14 pm

1 stop8h 30m

Portland

Tue 8/11

6:00 am-12:08 pm

1 stop7h 08m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 36 resultsSorted by cheapest first
1
2
3
4

Compare providers for flights from Chicago to Portland

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to Portland in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Chicago-Portland, Maine flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Chicago-Portland, Maine flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Chicago-Portland, Maine flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Portland, Maine flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Portland, Maine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Chicago to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Chicago 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 Chicago to Portland

How far ahead should I book a flight from Chicago to Portland, Maine?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Portland. Price data was last updated on April 10, 2026.

The best time to book flights from Chicago to Portland, Maine is 40 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago to Portland, Maine?

Currently, July is the cheapest month in which you can book a flight from Chicago to Portland, Maine (average of $101). Flying from Chicago to Portland, Maine in January is currently the most expensive (average of $209). 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 CHI to PWM?

Find hourly flight availability from Chicago to Portland. 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, 2026.

One of the essential ways to save on airfare from Chicago to Portland, Maine is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 9% on airfare.

What is the cheapest day to fly from Chicago to Portland, Maine?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Portland. Price data was last updated on April 11, 2026.

Travelers seeking maximum savings on their Chicago to Portland, Maine flight should consider departing on Sunday afternoons when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago to Portland, Maine

Explore weekly flight availability from Chicago to Portland. 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, 2026.

The most flights from CHI to PWM are scheduled on a Monday (9 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

How much does it cost to fly round-trip from Chicago to Portland, Maine?

How often are flights from Chicago to Portland delayed?

About 17% of weekly flights between Chicago and Portland have experienced delays in the past year, with the average delay time being 133 minutes.

What is the most punctual flight time for Chicago to Portland flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Chicago to Portland flights?

Over the last year, Southwest have had the lowest number of delays on this route, with just 8% of flights being delayed.

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. 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 Portland. Reviews last updated April 17, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Chicago to Portland by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,328 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,328 reviews
Southwest
8.0
Very good
4,328 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,406 reviews
Southwest
8.0
Very good
4,328 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,602 reviews
Southwest
8.0
Very good
4,328 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,593 reviews
Southwest
8.0
Very good
4,328 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

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

  • What airport do you fly into for flights to Portland from Chicago?

    Most people fly into Portland (PWM) if they book a flight to Portland from Chicago. On average, Portland has 7 inbound flights from Chicago per day from 3 airlines. Portland is conveniently located just 2.9 mi from Portland’s city center.

  • How long is the flight from Chicago to Portland, Maine?

    There are many flights that can get you from Chicago to Portland, Maine in 4h 05m. Fly via United Airlines, Southwest, or Delta to get the fastest option. There are 892 mi between Chicago and Portland, Maine. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Chicago to Portland, Maine round-trip?

    United Airlines, at $215, was found to be the cheapest airline from Chicago to Portland, Maine.Alternate airlines to your destination round-trip include American Airlines and Southwest. United Airlines is 39% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most reliable airlines from Chicago to Portland, Maine?

    No one likes to see their flight delayed. When booking a flight from Chicago to Portland, Maine consider choosing American Airlines (81%), Envoy Air (81%) or Republic Airways (79%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Chicago to Portland, Maine?

    Looking for the cheapest flight from Chicago to Portland, Maine? While on average our users pay $329, our data indicates the cheapest price to be $114. The most popular route (Chicago O'Hare Intl - Portland), is priced around $269.

  • Can I find deals for flights from Chicago to Portland that include hotel bookings?

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

  • How can I find direct flights from Chicago to Portland?

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

  • Can I find deals for business class flights from Chicago to Portland?

    Yes. Cheapflights offers flight deals from Chicago to Portland 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 Chicago to Portland, Maine?

    Currently, July is the cheapest month in which you can book a flight from Chicago to Portland, Maine (average of $101). Flying from Chicago to Portland, Maine in January is currently the most expensive (average of $209). 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

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Brunswick
Auburn
Lewiston
Conway

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.

Top 3 airlines flying from Chicago to Portland

Discover the top 3 airlines that operate flights from Chicago to Portland. 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, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$215Average$369FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$229Average$349FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$259Average$460FlexibilityNo 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.