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

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Fri 12/15
Fri 12/22
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Looking for a cheap flight? 25% of our users found flights on this route for $868 or less.

FAQs for Booking Chicago to Porto Flights

How long does a flight from Chicago to Porto take?
An average nonstop flight takes 21h 12m, covering a distance of 3928 miles.
Which airlines provide the cheapest flights from Chicago to Porto?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($544), Turkish Airlines ($653) and KLM ($674).
Do I need a passport to fly between Chicago and Porto?
Yes.

Book cheap flights from Chicago to Porto (round-trip)

Airports
Origin
Chicago
$544
only
$544
Destination
Porto
$544
only
$544
Tue, Jan 23
ORD
OPO
33h 05m
Tue, Feb 6
OPO
ORD
23h 23m
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Jan 25
ORD
OPO
32h 05m
Sun, Feb 4
OPO
ORD
35h 35m
Trip: 11 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16943 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
IST
BUD
Excellent 10.0

Same

Same

IST
NAP
Excellent 10.0

they provide such a great service so that I cannot find anything else to complain.

MNL
IST
Okay 5.3

Flight was ok

The flight was actually run by turkish airlines, not philippine air as stated in my confirmation email, so we were sent to the wrong terminal. Nothing in the email said which terminal the flight would depart from or that it was actually turkish airlines. Very irresponsible and communication for customers should be much clearer. Luckily we were very early for the flight or it could have caused a serious problem.

YYZ
IST
Excellent 10.0

Luggage policy, helpful ground and air crew. Price.

IST stoppover, damaged luggages.

JFK
IST
Excellent 9.0

The amazing entertainment system.

The smell of feet, and nausea from turbulence after food (not really Turkish's fault). Also, I'm getting too used to the food by now, and it doesn't seem to change much.

Fri, Apr 27
ORD
OPO
42h 05m
Mon, Apr 30
OPO
ORD
32h 50m
Trip: 4 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 1538 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.2
Food
7.5
JNB
AMS
Excellent 9.6

Comfort economy well worth the extra.

AMS
PRG
Excellent 10.0

Equally friendly crew and experience. It was complimented by the time we got to spend in the fantastic KLM lounge while we waited for the flight.

Nothing!

ATL
CLE
Okay 4.6

old plane, tight and uncomfortable

JFK
AMS
Good 7.6

Two hours delay in the start.

SFO
AMS
Okay 5.0

Crew was very helpful.food

Food was not upto the mark.

Sat, Jan 27
ORD
OPO
39h 12m
Sun, Feb 4
OPO
ORD
16h 29m
Trip: 9 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 2947 reviews
Overall
7.6
Boarding
7.5
Comfort
7.4
Crew
8.0
Entertainment
6.8
Food
7.2
LPA
LIS
Mediocre 2.0

Boarding was refused at gate due to late arrival of previous flight which was also a TAP flight. No assistance to delay following flight or accelerate our deplaning even though the next identical flight was three days later.

MXP
LIS
Excellent 8.0

Very gentle staff. Good food and service. And I will visit Lisbon next time.

Too early in the morning. A better connection in Lis wil lhelp

JFK
LIS
Mediocre 2.0

Cancelled our flight, at 4am. Did not give a reasonX

LIS
EWR
Good 6.3

Friendly and kind captain and crew

I was very very sick, so after the 3 hours delay I asked to stay in Lisbon and be sending next day to continue my journey home ... Surprisingly TAP told me that they could pay the hotel in Newark, but not in Lisbon.. Go figure! Called TAP Customer Service 4 times, 2 from Lisbon 2 from Newark... all cases more than 1 hour wait... AND THEY NEVER EVER ANSWERED!?!?!

LIS
MIA
Excellent 8.0

Shorter time over Atlantic. Very gentle staff. Good food and service. And I will visit Lisbon next time

Boarding from a bus at the main TAP airport for so many travellers and a long trip. Hei! Is not an economy charter!

Tue, Jan 23
ORD
OPO
33h 05m
Fri, Feb 2
OPO
ORD
32h 53m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 28
ORD
OPO
43h 27m
Tue, Feb 6
OPO
ORD
23h 23m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 23
ORD
OPO
32h 05m
Sun, Feb 4
OPO
ORD
35h 35m
Trip: 13 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16943 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
IST
ATL
Good 7.3

On board entertainment ststem has lots of options to choose from on all accounts. Food selection was good, served hot with large selection of drinks. Overall much better than US airlines that cross Atlantic.

More comfortable seats for long haul flights is a must have. Comfort+ Offered a money’s worth alternative to business or first class. Boarding is done away from terminal building which required busess for transportation back and forth. Prefer skybridge instead.

LAX
IST
Okay 5.0

Easy boarding I didn’t have check in bags so it was really quick and easy.seat was okay

The crew were not professional at all.missing serving people,some would get a snack or been asked what to drink and some got skipped. There were not enough food.

VKO
IST
Excellent 10.0

Great flight

Na

JNB
IST
Excellent 10.0

I'm 6 ft 2. Legspace was adequate, and no silly boxes under the seats like other airlines that obstruct your feet. Great entertainment systems - modern, good selection. Food and staff excellent.

Their online checkin systems could operate a bit more smoothly. At one point, I had to go in in person, because the online checkin site had an already past flight from their codeshare partner SAS showing up as the next flight, and I couldn't perform online checkin as a result.

IST
TLV
Excellent 9.6

Entertainment, and the plane which felt really new and comfy.

Food was a bit boring (because it was such a short flight, I suppose)

Sun, Jan 28
ORD
OPO
43h 27m
Fri, Feb 2
OPO
ORD
32h 53m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 24
ORD
OPO
34h 55m
Sun, Feb 4
OPO
ORD
35h 35m
Trip: 12 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16943 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
JNB
IST
Excellent 10.0

I'm 6 ft 2. Legspace was adequate, and no silly boxes under the seats like other airlines that obstruct your feet. Great entertainment systems - modern, good selection. Food and staff excellent.

Their online checkin systems could operate a bit more smoothly. At one point, I had to go in in person, because the online checkin site had an already past flight from their codeshare partner SAS showing up as the next flight, and I couldn't perform online checkin as a result.

MNL
IST
Okay 5.3

Flight was ok

The flight was actually run by turkish airlines, not philippine air as stated in my confirmation email, so we were sent to the wrong terminal. Nothing in the email said which terminal the flight would depart from or that it was actually turkish airlines. Very irresponsible and communication for customers should be much clearer. Luckily we were very early for the flight or it could have caused a serious problem.

IST
TLV
Excellent 9.6

Entertainment, and the plane which felt really new and comfy.

Food was a bit boring (because it was such a short flight, I suppose)

IST
SFO
Excellent 10.0

One of my fave airlines now Great seats, services, staff Turkish coffee in the air!

they keep the cabin a bit too hot, need to ask them all the time to make it colder

LAX
IST
Okay 5.0

Easy boarding I didn’t have check in bags so it was really quick and easy.seat was okay

The crew were not professional at all.missing serving people,some would get a snack or been asked what to drink and some got skipped. There were not enough food.

Tue, Jan 23
ORD
OPO
33h 05m
Mon, Feb 5
OPO
ORD
34h 29m
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Jan 25
ORD
OPO
32h 05m
Tue, Feb 6
OPO
ORD
32h 45m
Trip: 13 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16943 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
YYZ
IST
Excellent 10.0

Luggage policy, helpful ground and air crew. Price.

IST stoppover, damaged luggages.

IST
TLV
Excellent 9.6

Entertainment, and the plane which felt really new and comfy.

Food was a bit boring (because it was such a short flight, I suppose)

JNB
IST
Excellent 10.0

I'm 6 ft 2. Legspace was adequate, and no silly boxes under the seats like other airlines that obstruct your feet. Great entertainment systems - modern, good selection. Food and staff excellent.

Their online checkin systems could operate a bit more smoothly. At one point, I had to go in in person, because the online checkin site had an already past flight from their codeshare partner SAS showing up as the next flight, and I couldn't perform online checkin as a result.

IST
ATL
Good 7.3

On board entertainment ststem has lots of options to choose from on all accounts. Food selection was good, served hot with large selection of drinks. Overall much better than US airlines that cross Atlantic.

More comfortable seats for long haul flights is a must have. Comfort+ Offered a money’s worth alternative to business or first class. Boarding is done away from terminal building which required busess for transportation back and forth. Prefer skybridge instead.

IST
SFO
Excellent 10.0

One of my fave airlines now Great seats, services, staff Turkish coffee in the air!

they keep the cabin a bit too hot, need to ask them all the time to make it colder

Sun, Jan 28
ORD
OPO
43h 27m
Mon, Feb 5
OPO
ORD
34h 29m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 28
ORD
OPO
34h 55m
Sun, Feb 4
OPO
ORD
35h 35m
Trip: 8 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16943 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
IST
BUD
Excellent 10.0

Same

Same

YYZ
IST
Excellent 10.0

Luggage policy, helpful ground and air crew. Price.

IST stoppover, damaged luggages.

VKO
IST
Excellent 10.0

Great flight

Na

IST
ATL
Good 7.3

On board entertainment ststem has lots of options to choose from on all accounts. Food selection was good, served hot with large selection of drinks. Overall much better than US airlines that cross Atlantic.

More comfortable seats for long haul flights is a must have. Comfort+ Offered a money’s worth alternative to business or first class. Boarding is done away from terminal building which required busess for transportation back and forth. Prefer skybridge instead.

JFK
IST
Excellent 9.0

The amazing entertainment system.

The smell of feet, and nausea from turbulence after food (not really Turkish's fault). Also, I'm getting too used to the food by now, and it doesn't seem to change much.

Sat, Jan 27
ORD
OPO
47h 45m
Tue, Feb 6
OPO
ORD
34h 29m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Jan 26
ORD
OPO
39h 12m
Mon, Feb 5
OPO
ORD
17h 54m
Trip: 11 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 2947 reviews
Overall
7.6
Boarding
7.5
Comfort
7.4
Crew
8.0
Entertainment
6.8
Food
7.2
MXP
LIS
Excellent 8.0

Very gentle staff. Good food and service. And I will visit Lisbon next time.

Too early in the morning. A better connection in Lis wil lhelp

LIS
MXP
Mediocre 2.0

I had 1 jour layover but was a big lide for air line I would never travel with this air line again the rest my life They have me pay my luggage. That is stealing from customers Butshit

AGP
LIS
Excellent 10.0

Efficiency and friendliness of staff with a visible commitment towards passengers on-board (customers). One of the best experience, even though the flight was too short, and even then the airlines served snacks and refreshments... Simply Amazing... A 5-STAR service to its customers... Wow

NONE

LPA
LIS
Mediocre 2.0

Boarding was refused at gate due to late arrival of previous flight which was also a TAP flight. No assistance to delay following flight or accelerate our deplaning even though the next identical flight was three days later.

LIS
LHR
Good 6.8

The crew did a great job.

The boarding process was nutz. We had to take a bus away from the terminal to board the plane. The flight was delayed. I was not very happy to have to spend $92 to check 2 bags.

Sun, Feb 18
ORD
OPO
34h 55m
Sun, Feb 25
OPO
ORD
35h 35m
Trip: 8 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16943 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
JFK
IST
Excellent 9.0

The amazing entertainment system.

The smell of feet, and nausea from turbulence after food (not really Turkish's fault). Also, I'm getting too used to the food by now, and it doesn't seem to change much.

YYZ
IST
Excellent 10.0

Luggage policy, helpful ground and air crew. Price.

IST stoppover, damaged luggages.

MNL
IST
Okay 5.3

Flight was ok

The flight was actually run by turkish airlines, not philippine air as stated in my confirmation email, so we were sent to the wrong terminal. Nothing in the email said which terminal the flight would depart from or that it was actually turkish airlines. Very irresponsible and communication for customers should be much clearer. Luckily we were very early for the flight or it could have caused a serious problem.

IST
ATL
Good 7.3

On board entertainment ststem has lots of options to choose from on all accounts. Food selection was good, served hot with large selection of drinks. Overall much better than US airlines that cross Atlantic.

More comfortable seats for long haul flights is a must have. Comfort+ Offered a money’s worth alternative to business or first class. Boarding is done away from terminal building which required busess for transportation back and forth. Prefer skybridge instead.

LAX
IST
Okay 5.0

Easy boarding I didn’t have check in bags so it was really quick and easy.seat was okay

The crew were not professional at all.missing serving people,some would get a snack or been asked what to drink and some got skipped. There were not enough food.

Sat, Jan 27
ORD
OPO
47h 45m
Fri, Feb 2
OPO
ORD
32h 53m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Jan 27
ORD
OPO
21h 12m
Sat, Feb 3
OPO
ORD
17h 54m
Trip: 8 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 2947 reviews
Overall
7.6
Boarding
7.5
Comfort
7.4
Crew
8.0
Entertainment
6.8
Food
7.2
JFK
LIS
Mediocre 2.0

Cancelled our flight, at 4am. Did not give a reasonX

MXP
LIS
Excellent 8.0

Very gentle staff. Good food and service. And I will visit Lisbon next time.

Too early in the morning. A better connection in Lis wil lhelp

LIS
MXP
Mediocre 2.0

I had 1 jour layover but was a big lide for air line I would never travel with this air line again the rest my life They have me pay my luggage. That is stealing from customers Butshit

LIS
MIA
Excellent 8.0

Shorter time over Atlantic. Very gentle staff. Good food and service. And I will visit Lisbon next time

Boarding from a bus at the main TAP airport for so many travellers and a long trip. Hei! Is not an economy charter!

AGP
LIS
Excellent 10.0

Efficiency and friendliness of staff with a visible commitment towards passengers on-board (customers). One of the best experience, even though the flight was too short, and even then the airlines served snacks and refreshments... Simply Amazing... A 5-STAR service to its customers... Wow

NONE

Thu, Feb 22
ORD
OPO
32h 05m
Thu, Mar 1
OPO
ORD
35h 35m
Trip: 8 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 16943 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
8.0
VKO
IST
Excellent 10.0

Great flight

Na

IST
ATL
Good 7.3

On board entertainment ststem has lots of options to choose from on all accounts. Food selection was good, served hot with large selection of drinks. Overall much better than US airlines that cross Atlantic.

More comfortable seats for long haul flights is a must have. Comfort+ Offered a money’s worth alternative to business or first class. Boarding is done away from terminal building which required busess for transportation back and forth. Prefer skybridge instead.

YYZ
IST
Excellent 10.0

Luggage policy, helpful ground and air crew. Price.

IST stoppover, damaged luggages.

IST
SFO
Excellent 10.0

One of my fave airlines now Great seats, services, staff Turkish coffee in the air!

they keep the cabin a bit too hot, need to ask them all the time to make it colder

JNB
IST
Excellent 10.0

I'm 6 ft 2. Legspace was adequate, and no silly boxes under the seats like other airlines that obstruct your feet. Great entertainment systems - modern, good selection. Food and staff excellent.

Their online checkin systems could operate a bit more smoothly. At one point, I had to go in in person, because the online checkin site had an already past flight from their codeshare partner SAS showing up as the next flight, and I couldn't perform online checkin as a result.

Sat, Jan 27
ORD
OPO
47h 45m
Mon, Feb 5
OPO
ORD
34h 29m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
*
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.