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$88+ Cheap flights from Portland, ME (PWM) to Chicago (CHI)

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 5/24. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — CHI
Apr 29 — May 61
Tue 4/29
Tue 5/6
1 adult, Economy
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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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Portland to Chicago are usually found in September or July, booked 65 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap flight deals from Portland to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Chicago (CHI). 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 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$208
(Booking.com)

One-way from

$88
(Cheapflightsfares)

Popular in

November

Cheapest in

September

Average price

$356

Good round-trip deal

$362 or less

Good one-way deal

$178 or less
Provider with most accurate pricing for Portland-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Portland-Chicago (CHI) flights.
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From Portland to Chicago (CHI)
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One-way flight from Portland to Chicago (CHI)
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Highest demand for flights based on searches. 11% potential increase in price ($45 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 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 Portland to Chicago (CHI).
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Price to beat on a one-way flight from Portland to Chicago (CHI).
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Find flight deals from Portland to Chicago

Cheapest flights from Portland to Chicago
Explore the most affordable flight options available from Portland to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

This Booking.com deal was found by Cheapflights users on 4/22. 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.
Fri 5/169:30 pmPWM - ORD
1 stop27h 02mFrontier
Sun 5/184:15 pmORD - PWM
1 stop27h 25mFrontier
Deal found 4/22$208
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Sat 6/146:00 amPWM - ORD
Nonstop2h 53mUnited Airlines
Tue 6/176:25 pmORD - PWM
Nonstop2h 31mUnited Airlines
Deal found 4/22$209
This Southwest deal was found by Cheapflights users on 4/23. 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.
Wed 7/306:55 pmPWM - MDW
Nonstop2h 35mSouthwest
Tue 8/511:40 amMDW - PWM
Nonstop2h 15mSouthwest
Deal found 4/23$219
This Booking.com deal was found by Cheapflights users on 4/23. 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.
Thu 5/19:29 pmPWM - MDW
1 stop15h 55mFrontier
Sun 5/410:55 amMDW - PWM
1 stop7h 38mFrontier
Deal found 4/23$228
This Delta deal was found by Cheapflights users on 4/22. 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.
Mon 6/96:56 pmPWM - ORD
1 stop6h 03mDelta
Sat 6/1411:20 amORD - PWM
1 stop5h 13mDelta
Deal found 4/22$229
This JetBlue deal was found by Cheapflights users on 4/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/172:15 pmPWM - ORD
1 stop8h 39mJetBlue
Tue 5/204:03 pmORD - PWM
1 stop5h 57mJetBlue
Deal found 4/23$230
This Delta deal was found by Cheapflights users on 4/23. 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 5/215:30 amPWM - MDW
1 stop7h 23mDelta
Wed 5/284:15 pmMDW - PWM
1 stop6h 44mDelta
Deal found 4/23$239
This American Airlines deal was found by Cheapflights users on 4/22. 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 6/56:01 pmPWM - ORD
1 stop6h 56mAmerican Airlines
Sat 6/77:09 pmORD - PWM
Nonstop2h 38mAmerican Airlines
Deal found 4/22$245
This Southwest deal was found by Cheapflights users on 4/23. 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 9/188:45 amPWM - ORD
1 stop5h 00mSouthwest
Mon 9/2211:25 amORD - PWM
2 stops10h 45mSouthwest
Deal found 4/23$290
This Cheapflightsfares deal was found by Cheapflights users on 4/22. 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.
Fri 6/2712:40 pmPWM - ORD
1 stop5h 35mSun Country Air
Sun 6/298:17 pmORD - PWM
1 stop14h 06mSun Country Air
Deal found 4/22$368

Cheapflights Fare Finder

Customize your flight search to find flights from Portland to Chicago 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 24, 2025.
Use the filters below to find and compare flights from Portland to Chicago that are best for you.

Fly from

Portland

Fly to

Chicago

Route

Depart

Return

Price

PortlandChicago

PWM - ORD

PWMORD

Portland

Thu 9/25

6:00 am-7:56 am

Nonstop2h 56m

Chicago O'Hare Intl

Sun 9/28

7:12 pm-10:46 pm

Nonstop2h 34m

$209

PortlandChicago

PWM - ORD

PWMORD

Portland

Thu 6/12

7:09 pm-11:30 pm

1 stop5h 21m

Chicago O'Hare Intl

Tue 6/17

6:25 pm-9:56 pm

Nonstop2h 31m

$219

PortlandChicago

PWM - MDW

PWMMDW

Portland

Wed 7/30

6:55 pm-8:30 pm

Nonstop2h 35m

Chicago Midway

Tue 8/5

11:40 am-2:55 pm

Nonstop2h 15m

$219

PortlandChicago

PWM - ORD

PWMORD

Portland

Wed 5/28

11:33 am-9:20 pm

2 stops10h 47m

Chicago O'Hare Intl

Sat 5/31

3:59 pm-12:14 am

1 stop7h 15m

$222

PortlandChicago

PWM - ORD

PWMORD

Portland

Fri 5/9

9:30 pm-11:32 pm

1 stop27h 02m

Chicago O'Hare Intl

Sun 5/11

4:15 pm-8:40 pm

1 stop27h 25m

$228

PortlandChicago

PWM - MDW

PWMMDW

Portland

Wed 5/21

5:30 am-11:53 am

1 stop7h 23m

Chicago Midway

Wed 5/28

1:55 pm-11:59 pm

2 stops9h 04m

$228

PortlandChicago

PWM - ORD

PWMORD

Portland

Sat 5/17

2:15 pm-9:54 pm

1 stop8h 39m

Chicago O'Hare Intl

Tue 5/20

4:03 pm-11:00 pm

1 stop5h 57m

$230

PortlandChicago

PWM - ORD

PWMORD

Portland

Thu 9/18

8:45 am-12:45 pm

1 stop5h 00m

Chicago O'Hare Intl

Mon 9/22

11:25 am-11:10 pm

2 stops10h 45m

$290

PortlandChicago

PWM - ORD

PWMORD

Portland

Fri 6/27

12:40 pm-5:15 pm

1 stop5h 35m

Chicago O'Hare Intl

Sun 6/29

8:17 pm-11:23 am

1 stop14h 06m

$385

PortlandChicago

PWM - ORD

PWMORD

Portland

Wed 6/11

8:07 pm-7:11 pm

2 stops24h 04m

Chicago O'Hare Intl

Wed 6/18

5:51 am-8:12 pm

3 stops37h 21m

$481

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 23 results
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Compare providers for flights from Portland to Chicago

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 Portland to Chicago in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 Portland, Maine-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-Chicago flights, Cheapflights users trust eDreams the most. eDreams 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 Portland, Maine-Chicago 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 Portland to Chicago

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

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

Use this chart to determine the optimal time to book a round-trip flight from Portland to Chicago. Price data was last updated on April 18, 2025.

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland, Maine to Chicago. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Chicago (average of $245). Flying from Portland, Maine to Chicago in March is currently the most expensive (average of $321). 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 PWM to CHI?

Find hourly flight availability from Portland to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

One of the essential ways to save on airfare from Portland, Maine to Chicago is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 77% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Portland to Chicago. Price data was last updated on March 30, 2025.

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

Weekly flight availability from Portland, Maine to Chicago

Explore weekly flight availability from Portland to Chicago. 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 24, 2025.

The most flights from PWM to CHI are scheduled on a Monday (7 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Chicago by month

Plan your trip to Chicago by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.

Temperature in Chicago by month

Plan your trip to Chicago by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chicago, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated April 24, 2025.
Get a feel of what it's like to fly with Southwest, Delta and Avelo Airlines from Portland to Chicago by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,286 reviews

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.1

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,286 reviews
Southwest
8.0
Very good
4,286 reviews

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.1

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Delta
8.0
Very good
7,920 reviews
Southwest
8.0
Very good
4,286 reviews

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.1

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Avelo Airlines
7.5
Good
Southwest
8.0
Very good
4,286 reviews

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.1

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
United Airlines
7.4
Good
8,685 reviews
Southwest
8.0
Very good
4,286 reviews

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.1

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
JetBlue
7.3
Good
2,924 reviews
Southwest
8.0
Very good
4,286 reviews

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.1

Overall

8.0

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

Related info for your journey

Find useful and relevant information for your journey from Portland to Chicago. 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 from for flights from Portland to Chicago?

    For a flight from Portland to Chicago, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city. Portland is the only Portland airport and it handles 4 outbound flights to Chicago per day. 5 airlines have flights to Chicago from Portland on a regular basis.

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

    Cheapflights users have booked flights from Portland, Maine to Chicago round-trip from $208. Other airlines that can offer you cheap pricing are United Airlines, from $209, and Southwest, from $219. These flights start at 43% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Portland, Maine to Chicago one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $88. Users have also found prices from $90 and $100 on United Airlines and Southwest, respectively.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland, Maine to Chicago on time: Republic Airways (91%), Emirates (81%), Air New Zealand (81%).

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

    On average you can expect to pay $906 for a flight from Portland, Maine to Chicago. The cheapest flight overall is $124 while the most popular route, (Portland - Chicago O'Hare Intl) is currently priced at $183.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Portland, Maine to Chicago (average of $245). Flying from Portland, Maine to Chicago in March is currently the most expensive (average of $321). 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
Merrillville
Hammond
Benton Harbor
Porter
Lansing
Valparaiso
Chesterton

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Portland to Chicago

Discover the top 5 airlines that operate flights from Portland to Chicago. 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 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$38Average$109FlexibilityNo cancel feeOn-time62%
DeltaCheapest$124Average$353FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$158Average$317FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$194Average$393FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$264Average$379FlexibilityNo cancel feeOn-time63%

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