$425 Cheap Flights from Chicago (MDW) to Porto (OPO)

View $425 flight on Wed, Jan 7, 2026Opens in a new window

Popular airlines from Chicago Midway Airport (MDW) to Porto Airport (OPO)

Cheap Flights from Chicago to Porto (MDW-OPO)

Prices were available within the past 7 days and start at $425 for one-way flights and $496 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Jan 7 - Thu, Feb 26
MDW
Chicago
OPO
Porto
$496 Roundtrip, found 9 hours ago
$496
Roundtrip
found 9 hours ago
Select Delta flight, departing Wed, Jan 7 from Chicago to Porto, returning Thu, Feb 26, priced at $496 found 9 hours ago
Delta
Wed, Jan 7 - Thu, Feb 26
MDW
Chicago
OPO
Porto
$502 Roundtrip, found 9 hours ago
$502
Roundtrip
found 9 hours ago
Select Delta flight, departing Wed, Jan 7 from Chicago to Porto, returning Thu, Feb 26, priced at $502 found 9 hours ago
Delta
Tue, Dec 9 - Tue, Dec 16
MDW
Chicago
OPO
Porto
$522 Roundtrip, found 1 hour ago
$522
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Dec 9 from Chicago to Porto, returning Tue, Dec 16, priced at $522 found 1 hour ago
Delta
Wed, Nov 12 - Tue, Nov 18
MDW
Chicago
OPO
Porto
$528 Roundtrip, found 1 day ago
$528
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Nov 12 from Chicago to Porto, returning Tue, Nov 18, priced at $528 found 1 day ago
Virgin Atlantic
Wed, Jan 7 - Thu, Feb 26
MDW
Chicago
OPO
Porto
$528 Roundtrip, found 9 hours ago
$528
Roundtrip
found 9 hours ago
Select Virgin Atlantic flight, departing Wed, Jan 7 from Chicago to Porto, returning Thu, Feb 26, priced at $528 found 9 hours ago
Delta
Tue, Dec 9 - Tue, Dec 16
MDW
Chicago
OPO
Porto
$544 Roundtrip, found 1 hour ago
$544
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Dec 9 from Chicago to Porto, returning Tue, Dec 16, priced at $544 found 1 hour ago
Delta
Fri, Nov 14 - Thu, Nov 20
MDW
Chicago
OPO
Porto
$546 Roundtrip, found 1 day ago
$546
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Nov 14 from Chicago to Porto, returning Thu, Nov 20, priced at $546 found 1 day ago
Delta
Tue, Dec 9 - Tue, Dec 16
MDW
Chicago
OPO
Porto
$548 Roundtrip, found 1 hour ago
$548
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Dec 9 from Chicago to Porto, returning Tue, Dec 16, priced at $548 found 1 hour ago
Air France
Wed, Nov 26 - Wed, Jan 14
MDW
Chicago
OPO
Porto
$602 Roundtrip, found 22 hours ago
$602
Roundtrip
found 22 hours ago
Select Air France flight, departing Wed, Nov 26 from Chicago to Porto, returning Wed, Jan 14, priced at $602 found 22 hours ago
KLM
Thu, Nov 13 - Tue, Nov 18
MDW
Chicago
OPO
Porto
$604 Roundtrip, found 1 day ago
$604
Roundtrip
found 1 day ago
Select KLM flight, departing Thu, Nov 13 from Chicago to Porto, returning Tue, Nov 18, priced at $604 found 1 day ago
Flights from Chicago (MDW) to Porto (OPO)
Origin airport
Midway Intl.
Destination airport
Dr. Francisco de Sa Carneiro
Airlines serving
Air France, Delta
Roundtrip price
$496
Distance
3933 mi

Chicago to Porto Flights

The cheapest times to fly from Chicago to Porto

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Chicago to Porto are during the month of January. You can find some of the cheapest flights from Chicago to Porto with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Porto

Sunday is one of the best days to book for cheap flights from Chicago to Porto: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Chicago to Porto

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Chicago to Porto in 2025. You can also book with separate airlines for your outbound and return journeys, from $425 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Chicago to Porto flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Chicago to Porto airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO) cost?
Lock in a cheap one-way flight from $425 or cheap return flight from $496 from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO)?
The cheapest month to fly from MDW to OPO is January, when there's less demand. Off-peak months are generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from MDW to OPO. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO)?
There are no daily nonstop flights from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from MDW to OPO?
Generally you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* But this can vary depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO)?
To reach Dr. Francisco de Sa Carneiro Airport (OPO) on schedule, select a flight that leaves from Midway Intl. Airport (MDW) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO) last-minute?
Last-minute fares from MDW to OPO are typically more expensive. To secure the lowest prices, start searching for flights well in advance. That said, if you're flexible with your travel plans, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a MDW to OPO flight and hotel package?
Compared with arranging hotels and flights separately, booking a MDW to OPO flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place will take the hassle out of travel planning. Just secure your flights and choose from our extensive range of stays, then tailor your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Midway Intl. Airport (MDW) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Typically, you can modify or cancel your MDW to OPO flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you need more details, go to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.