$314+ Cheap flights from Chicago (CHI) to Porto (OPO)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — OPO
Nov 4 — Nov 111
Round-trip
1 adult, Economy
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Find cheap flights from Chicago to Porto 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.Cheap flight deals from Chicago to Porto
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Cheapest flights from Chicago to PortoExplore the most affordable flight options available from Chicago to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 5, 2026.
Explore the most affordable flight options available from Chicago to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 5, 2026.
This Booking.com deal was found by Cheapflights users on 9/30. 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 12/48:10 pm -
1 stop16h 50m
Sun 12/138:30 am -
1 stop13h 00m
Deal found 9/30![TAP AIR PORTUGAL logo]()
$554
This Booking.com deal was found by Cheapflights users on 10/2. 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 10/309:10 pm -
1 stop22h 20m
Fri 11/65:00 am -
1 stop16h 30m
Deal found 10/2![TAP AIR PORTUGAL logo]()
$562
This Mytrip deal was found by Cheapflights users on 10/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/228:10 pm -
1 stop14h 50m
Tue 12/18:00 pm -
1 stop25h 30m
Deal found 10/4![TAP AIR PORTUGAL logo]()
$568
This FlightHub deal was found by Cheapflights users on 10/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm -
1 stop12h 50m
Sun 11/87:00 am -
1 stop14h 30m
Deal found 10/1![JetBlue logo]()
$572
This Justfly.com deal was found by Cheapflights users on 10/1. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/259:10 pm -
1 stop31h 50m
Wed 11/48:30 am -
1 stop13h 00m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$576
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Sun 10/259:10 pm -
1 stop15h 50m
Tue 11/108:00 pm -
1 stop25h 30m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$583
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Fri 11/278:10 pm -
1 stop11h 20m
Sat 12/58:00 pm -
1 stop25h 30m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$590
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Sun 11/298:10 pm -
1 stop11h 20m
Fri 12/118:30 am -
1 stop13h 00m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$591
This Kiwi.com deal was found by Cheapflights users on 10/3. 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.
Sun 11/298:10 pm -
1 stop11h 20m
Tue 12/88:00 pm -
1 stop25h 30m
Deal found 10/3![TAP AIR PORTUGAL logo]()
$592
This Kiwi.com deal was found by Cheapflights users on 10/4. 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.
Wed 11/257:00 pm -
1 stop12h 30m
Wed 12/98:30 am -
1 stop13h 00m
Deal found 10/4![TAP AIR PORTUGAL logo]()
$594
This Kiwi.com deal was found by Cheapflights users on 10/4. 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.
Wed 11/257:00 pm -
1 stop14h 00m
Sat 12/58:00 pm -
1 stop25h 30m
Deal found 10/4![TAP AIR PORTUGAL logo]()
$595
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Wed 12/27:00 pm -
1 stop16h 00m
Sun 12/68:30 am -
1 stop13h 00m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$596
Best flights from Chicago to PortoDiscover carefully curated flight deals from Chicago to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 5, 2026.
Discover carefully curated flight deals from Chicago to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 5, 2026.
This United Airlines deal was found by Cheapflights users on 10/3. 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.
Tue 11/1712:59 pm -
1 stop14h 31m
Tue 11/246:00 am -
1 stop13h 10m
Deal found 10/3![United Airlines logo]()
$744
This Delta deal was found by Cheapflights users on 10/4. 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 11/2311:19 am -
2 stops17h 16m
Wed 12/211:15 am -
1 stop33h 10m
Deal found 10/4![Delta logo]()
$750
This KLM deal was found by Cheapflights users on 10/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/15:59 pm -
2 stops15h 26m
Wed 12/95:00 am -
2 stops17h 17m
Deal found 10/1![KLM logo]()
$850
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sun 11/11:30 pm -
2 stops14h 00m
Sun 11/86:00 am -
1 stop13h 10m
Deal found 10/1![United Airlines logo]()
$770
This United Airlines deal was found by Cheapflights users on 9/30. 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.
Sun 11/152:03 pm -
2 stops13h 27m
Sun 11/226:00 am -
2 stops17h 16m
Deal found 9/30![United Airlines logo]()
$780
This United Airlines deal was found by Cheapflights users on 9/30. 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 11/147:45 pm -
2 stops31h 45m
Sat 11/2112:30 pm -
1 stop30h 40m
Deal found 9/30![United Airlines logo]()
$808
This United Airlines deal was found by Cheapflights users on 10/2. 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.
Sun 11/811:05 am -
2 stops16h 25m
Wed 11/186:00 am -
2 stops22h 18m
Deal found 10/2![United Airlines logo]()
$815
This United Airlines deal was found by Cheapflights users on 9/30. 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.
Tue 11/242:03 pm -
2 stops13h 27m
Tue 12/16:00 am -
1 stop15h 20m
Deal found 9/30![United Airlines logo]()
$838
Last-minute flights from Chicago to PortoDiscover last-minute flight deals from Chicago to Porto. Data last updated October 5, 2026 and is based on user searches.
Discover last-minute flight deals from Chicago to Porto. Data last updated October 5, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 10/1. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/259:10 pm -
1 stop31h 50m
Wed 11/48:30 am -
1 stop13h 00m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$576
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Sun 10/259:10 pm -
1 stop15h 50m
Tue 11/108:00 pm -
1 stop25h 30m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$583
This Booking.com deal was found by Cheapflights users on 10/2. 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 10/309:10 pm -
1 stop22h 20m
Fri 11/65:00 am -
1 stop16h 30m
Deal found 10/2![TAP AIR PORTUGAL logo]()
$562
This FlightHub deal was found by Cheapflights users on 10/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm -
1 stop12h 50m
Sun 11/87:00 am -
1 stop14h 30m
Deal found 10/1![JetBlue logo]()
$572
This Mytrip deal was found by Cheapflights users on 10/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/228:10 pm -
1 stop14h 50m
Tue 12/18:00 pm -
1 stop25h 30m
Deal found 10/4![TAP AIR PORTUGAL logo]()
$568
This Kiwi.com deal was found by Cheapflights users on 10/4. 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.
Wed 11/257:00 pm -
1 stop12h 30m
Wed 12/98:30 am -
1 stop13h 00m
Deal found 10/4![TAP AIR PORTUGAL logo]()
$594
This Kiwi.com deal was found by Cheapflights users on 10/4. 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.
Wed 11/257:00 pm -
1 stop14h 00m
Sat 12/58:00 pm -
1 stop25h 30m
Deal found 10/4![TAP AIR PORTUGAL logo]()
$595
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Fri 11/278:10 pm -
1 stop11h 20m
Sat 12/58:00 pm -
1 stop25h 30m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$590
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Sun 11/298:10 pm -
1 stop11h 20m
Sun 12/68:30 am -
1 stop13h 00m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$591
This Kiwi.com deal was found by Cheapflights users on 10/3. 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.
Sun 11/298:10 pm -
1 stop11h 20m
Tue 12/88:00 pm -
1 stop25h 30m
Deal found 10/3![TAP AIR PORTUGAL logo]()
$592
This Kiwi.com deal was found by Cheapflights users on 10/4. 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.
Sun 11/298:10 pm -
1 stop29h 20m
Sat 12/128:00 pm -
1 stop25h 30m
Deal found 10/4![TAP AIR PORTUGAL logo]()
$599
This Ovago deal was found by Cheapflights users on 10/1. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/298:10 pm -
1 stop11h 20m
Thu 12/108:00 pm -
1 stop25h 30m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$613
One-way flights from Chicago to PortoSearch for one-way flight options from Chicago to Porto. Find affordable one-way fares based on user searches. Data last updated October 5, 2026.
Search for one-way flight options from Chicago to Porto. Find affordable one-way fares based on user searches. Data last updated October 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Fri 11/276:30 pm -
3 stops40h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Multiple Airlines logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Mon 11/306:30 pm -
3 stops42h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Sat 11/286:30 pm -
3 stops39h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Multiple Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Sun 11/296:30 pm -
3 stops31h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Multiple Airlines logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Tue 12/16:30 pm -
2 stops32h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Multiple Airlines logo]()
$353
Find flight deals from Chicago to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Porto (OPO). 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 October 5, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $554 (Booking.com) |
One-way from | $314 (Kiwi.com) |
Popular in | August |
Cheapest in | April |
Average price | $851 |
Cheapflights Fare Finder
Customize your flight search to find flights from Chicago to Porto 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 7,457,451 searches. Data last updated October 5, 2026.
Use the filters below to find and compare flights from Chicago to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sat 11/28
6:30 pm-5:30 pm
2 stops17h 00m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$346
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 11/29
6:30 pm-11:55 pm
2 stops23h 25m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$373
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Wed 12/2
8:05 pm-8:25 am
1 stop30h 20m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$393
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Thu 11/26
5:40 pm-10:00 pm
1 stop22h 20m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$423
Quickest round-trip
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Sun 11/22
8:10 pm-1:30 pm
1 stop11h 20m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$509
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Mon 11/16
1:35 pm-10:35 am
2 stops15h 00m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$533
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Mon 11/16
8:15 pm-3:25 pm
1 stop37h 10m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$552
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Tue 10/13
8:10 pm-10:00 am
1 stop31h 50m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$552
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Mon 11/23
6:25 pm-10:00 pm
1 stop21h 35m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$558
ChicagoPorto
ORD Chicago O'Hare Intl - OPO Porto
ORDOPO
Chicago O'Hare Intl
Tue 11/17
12:59 pm-9:30 am
1 stop14h 31m
Porto
Tue 11/24
6:00 am-1:10 pm
1 stop13h 10m
$744
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from Chicago to Porto
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 Porto in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Chicago-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Chicago-Porto flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Chicago-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Chicago-Porto flights, Cheapflights users trust Ovago the most. Ovago 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-Porto 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 Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Chicago with our price prediction graph.
CHI-OPO
ORD-OPO
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 Porto
CHI-OPO
ORD-OPO
What is the cheapest month to book a flight from Chicago to Porto?
Currently, January is the cheapest month in which you can book a flight from Chicago to Porto (average of $577). Flying from Chicago to Porto in June is currently the most expensive (average of $1,141). 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.
How much does it cost to fly round-trip from Chicago to Porto?
Airfare is below average for this route at the moment.
Chicago to Porto flights typically cost between $774 and $1,022 in December.The cheapest round-trip price found within the last 5 days was $554 on TAP AIR PORTUGAL (Dec 4-Dec 13).
How far ahead should I book a flight from Chicago to Porto?
The price you pay for your flight from Chicago to Porto may vary depending on when you book. For the best chance of a lower fare, look to book 65 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Reviews of airlines servicing Porto
Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated October 5, 2026.
See what other customers who have flown with United Airlines and TAP AIR PORTUGAL from Chicago to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.4
Comfort
7.3
Food
6.7
Crew
8.1
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Comfort
7.3
Food
6.7
Crew
8.1
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Overall
7.4
Comfort
7.3
Food
6.7
Crew
8.1
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Related info for your journey
Find useful and relevant information for your journey from Chicago to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
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Porto flight routes
Alternative routes for Chicago to Porto
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Chicago to Porto by cabin class
Find flights from Chicago to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Chicago and Porto flights
Browse other Chicago and Porto flight options. Last updated on October 5, 2026.
Other flights from Chicago
Browse through other flights departing from Chicago. Flights are based on user searches made on Cheapflights and were last updated on October 5, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 5, 2026.
Top 5 airlines flying from Chicago to Porto
Discover the top 5 airlines that operate flights from Chicago to Porto. 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 7,457,451 searches. Data last updated October 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$451 | Average$832 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$474 | Average$689 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$519 | Average$747 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$618 | Average$672 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$623 | Average$941 | FlexibilityNo cancel fee | On-time69% |