Find Cheap Flights from Chicago to Porto (CHI - OPO)

Flights overview

Useful information for finding cheap flights from Chicago to Porto and booking your next trip

Cheapest round-trip flights	$947	SWISS 1 stop 16 hr Sun, May 3 — Mon, May 18	The cheapest round-trip flight from Chicago to Porto is currently $947
Cheapest one-way flight	$433	Delta 2 stops 34 hr Sat, Aug 1	The cheapest one-way flight from Chicago to Porto is currently $433
Last-minute weekend getaway	$909	SWISS 1 stop 18 hr Thu, May 7 — Mon, May 11	The cheapest last-minute weekend getaway from Chicago to Porto is currently $909
Cheapest business class flights	$3,036	Turkish Airlines 1 stop 22 hr Thu, Jul 23 — Wed, Aug 5	The cheapest business class round-trip flight from Chicago to Porto is currently $3,036

Fastest flight	10 hr 29 min	The fastest flight with stops from Chicago to Porto takes 10 hr 29 min
Nonstop flights	None	There are no direct flights on this route.

When is the cheapest time to fly?

The cheapest month to fly from Chicago to Porto is typically November. The most expensive month to fly is typically May.

November Cheapest	Typical prices: $475–810
May Most expensive	Typical prices: $850–1,350

Popular airlines from Chicago to Porto

United

from $981

Typical price: $680–1,900

78 weekly connecting flights

ORD - OPO Every day
Lufthansa

from $969

Typical price: $660–1,600

30 weekly connecting flights

ORD - OPO Every day
Turkish Airlines

from $1,071

Typical price: $660–1,950

21 weekly connecting flights

ORD - OPO Every day
KLM

from $982

Typical price: $670–1,600

19 weekly connecting flights

ORD - OPO Every day
SWISS

from $947

Typical price: $700–1,600

17 weekly connecting flights

ORD - OPO Every day
Tap Air Portugal

from $855

Typical price: $730–1,750

16 weekly connecting flights

ORD - OPO Every Wed, Fri, Sat, Sun

Popular airports near Chicago

Chicago O'Hare International Airport (ORD)

Chicago United States 26 min 16 mi
Chicago Midway International Airport (MDW)

Chicago United States 25 min 9 mi
Milwaukee Mitchell International Airport (MKE)

Milwaukee United States 1 hr 23 min 75 mi
Indianapolis International Airport (IND)

Indianapolis United States 2 hr 58 min 165 mi

Popular airports near Porto

Francisco Sá Carneiro Airport (OPO)

Porto Portugal 17 min 6 mi
Humberto Delgado Airport (LIS)

Lisbon Portugal 2 hr 55 min 167 mi
Santiago-Rosalía de Castro Airport (SCQ)

Santiago de Compostela Spain 2 hr 31 min 120 mi
Vigo Airport (VGO)

Vigo Spain 1 hr 29 min 73 mi

Frequently asked questions about flying from Chicago to Porto

The cheapest flights from Chicago to Porto are usually in November. Typical ticket prices in November range from $475 to $810.

The cheapest round-trip flight from Chicago to Porto recently found on Google Flights was with SWISS from $947. The cheapest one-way flight was with Delta from $433.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest United flight from Chicago to Porto is $981, flying from May 3 to May 19.
The cheapest Lufthansa flight from Chicago to Porto is $969, flying from May 4 to May 18.
The cheapest Turkish Airlines flight from Chicago to Porto is $1,071, flying from Jul 9 to Jul 23.
The cheapest KLM flight from Chicago to Porto is $982, flying from May 3 to May 19.
The cheapest SWISS flight from Chicago to Porto is $947, flying from May 3 to May 18.
The cheapest Tap Air Portugal flight from Chicago to Porto is $855, flying from Jul 30 to Aug 12.

The cheapest round-trip flight from Chicago to Porto starts at $947 from Sun, May 3 to Mon, May 18. The cheapest one-way flight starts at $433 and departs on Sat, Aug 1.

10 hr 29 min is the shortest flight time from Chicago to Porto.

Peak travel is Apr–Aug, when the weather is mostly warm. Monthlong São João (Jun) combines an ancient celebration of midsummer with the Christian festival of St. John, and reaches its peak with fireworks and dancing on the evening of Jun 23. Porto's maritime climate brings mild, rainy winters (Dec–Feb).

It's easy to use Google Flights to find the cheapest days to fly from Chicago to Porto.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.

What counts as the best airline for your flights from Chicago to Porto really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from Chicago to Porto.

In terms of flights, United is the most popular. United offers 78 connecting flights per week. United flies from Chicago O'Hare International Airport (ORD) to Francisco Sá Carneiro Airport (OPO) .

Other popular airlines flying from Chicago to Porto are:

Lufthansa offers 30 connecting flights per week. Lufthansa flies from Chicago O'Hare International Airport (ORD) to Francisco Sá Carneiro Airport (OPO) .
Turkish Airlines offers 21 connecting flights per week. Turkish Airlines flies from Chicago O'Hare International Airport (ORD) to Francisco Sá Carneiro Airport (OPO) .
KLM offers 19 connecting flights per week. KLM flies from Chicago O'Hare International Airport (ORD) to Francisco Sá Carneiro Airport (OPO) .
SWISS offers 17 connecting flights per week. SWISS flies from Chicago O'Hare International Airport (ORD) to Francisco Sá Carneiro Airport (OPO) .
Tap Air Portugal offers 16 connecting flights per week. Tap Air Portugal flies from Chicago O'Hare International Airport (ORD) to Francisco Sá Carneiro Airport (OPO) .

The number of connecting flights refers to distinct flights with at least one stop between Chicago and Porto.

The cheapest round-trip flight from Chicago to Porto recently found on Google Flights was with SWISS from $947. The cheapest one-way flight was with Delta from $433.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest United flight from Chicago to Porto is $981, flying from May 3 to May 19.
The cheapest Lufthansa flight from Chicago to Porto is $969, flying from May 4 to May 18.
The cheapest Turkish Airlines flight from Chicago to Porto is $1,071, flying from Jul 9 to Jul 23.
The cheapest KLM flight from Chicago to Porto is $982, flying from May 3 to May 19.
The cheapest SWISS flight from Chicago to Porto is $947, flying from May 3 to May 18.
The cheapest Tap Air Portugal flight from Chicago to Porto is $855, flying from Jul 30 to Aug 12.

No airline flies direct from Chicago to Porto.

There are 78 United connecting flights from Chicago to Porto per week. Flights are available every day.
There are 30 Lufthansa connecting flights from Chicago to Porto per week. Flights are available every day.
There are 21 Turkish Airlines connecting flights from Chicago to Porto per week. Flights are available every day.
There are 19 KLM connecting flights from Chicago to Porto per week. Flights are available every day.
There are 17 SWISS connecting flights from Chicago to Porto per week. Flights are available every day.
There are 16 Tap Air Portugal connecting flights from Chicago to Porto per week. Flights are available on Wednesday, Friday, Saturday and Sunday.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

The cheapest last-minute deal between Chicago and Porto at price $909 is offered by SWISS from Thu, May 7 to Mon, May 11.

No airline flies direct from Chicago to Porto.

There are 78 United connecting flights from Chicago to Porto per week. Flights are available every day.
There are 30 Lufthansa connecting flights from Chicago to Porto per week. Flights are available every day.
There are 21 Turkish Airlines connecting flights from Chicago to Porto per week. Flights are available every day.
There are 19 KLM connecting flights from Chicago to Porto per week. Flights are available every day.
There are 17 SWISS connecting flights from Chicago to Porto per week. Flights are available every day.
There are 16 Tap Air Portugal connecting flights from Chicago to Porto per week. Flights are available on Wednesday, Friday, Saturday and Sunday.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

There are no direct flights from Chicago to Porto.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from Chicago to Porto, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.

The cheapest business class round-trip flights between Chicago and Porto start at $3,036 from Thu, Jul 23 to Wed, Aug 5 with Turkish Airlines.

The cheapest economy class round-trip flights between Chicago and Porto start at $947 from Sun, May 3 to Mon, May 18.

To book business class trips from Chicago to Porto, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.

The best last-minute getaway deal for the next weekend between Chicago and Porto starts at $909 from Thu, May 7 to Mon, May 11 with SWISS.

The cheapest last-minute deal between Chicago and Porto at price $909 is offered by SWISS from Thu, May 7 to Mon, May 11.

To find last-minute flight deals from Chicago to Porto, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.