OPO

Find cheap United Airlines flights to Porto from $469

1 adult

Search hundreds of travel sites at once for deals on United Airlines flights to Porto

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
Flights Deals

Cheap United Airlines Flight Deals to Porto

 
Here are some of the best deals found on KAYAK recently from United Airlines to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip United Airlines flight deals to Porto

KAYAK's recommended round-trip United Airlines deals departing in the coming months to Porto.
Discover the best prices for you by selecting your travel dates on KAYAK.
United Airlines Logo
10:20 am - 9:35 amBOS-OPO
18h 15m1 stop
United Airlines Logo
12:10 pm - 9:47 amOPO-BOS
26h 37m2 stops
$551United Airlines
Find Deal
Mon, Aug 11 - Thu, Aug 21
United Airlines Logo
10:45 am - 9:20 amBOS-OPO
17h 35m2 stops
United Airlines Logo
12:50 pm - 3:13 pmOPO-BOS
31h 23m2 stops
$555United Airlines
Find Deal
Wed, Aug 6 - Tue, Aug 26
United Airlines Logo
6:03 pm - 9:20 amBOS-OPO
34h 17m2 stops
United Airlines Logo
12:10 pm - 11:12 amOPO-BOS
28h 02m2 stops
$561United Airlines
Find Deal
Tue, Jul 1 - Thu, Aug 28
United Airlines Logo
3:20 pm - 9:35 amBOS-OPO
13h 15m1 stop
United Airlines Logo
12:50 pm - 2:35 pmOPO-BOS
30h 45m1 stop
$563United Airlines
Find Deal
Mon, Aug 4 - Tue, Aug 26
United Airlines Logo
6:30 pm - 9:20 amORD-OPO
32h 50m2 stops
United Airlines Logo
12:50 pm - 11:49 amOPO-ORD
28h 59m2 stops
$564United Airlines
Find Deal
Tue, Sep 16 - Tue, Sep 30
United Airlines Logo
4:33 pm - 7:45 amBOS-OPO
10h 12m1 stop
United Airlines Logo
12:10 pm - 9:56 pmOPO-BOS
14h 46m1 stop
$568United Airlines
Find Deal
Tue, Aug 5 - Thu, Aug 28
United Airlines Logo
10:20 am - 9:20 amBOS-OPO
18h 00m1 stop
United Airlines Logo
6:00 am - 3:40 pmOPO-BOS
14h 40m1 stop
$573United Airlines
Find Deal
Wed, Aug 6 - Fri, Aug 29
United Airlines Logo
6:59 pm - 9:45 amBOS-OPO
9h 46m1 stop
United Airlines Logo
9:00 am - 4:28 pmOPO-BOS
12h 28m1 stop
$578United Airlines
Find Deal
Tue, Aug 5 - Tue, Aug 26
United Airlines Logo
2:46 pm - 7:45 amBOS-OPO
11h 59m2 stops
United Airlines Logo
6:00 am - 8:10 pmOPO-BOS
19h 10m1 stop
$582United Airlines
Find Deal
Tue, Aug 5 - Wed, Aug 27
United Airlines Logo
1:33 pm - 6:55 amBOS-OPO
12h 22m1 stop
United Airlines Logo
9:35 am - 6:55 pmOPO-BOS
14h 20m2 stops
$583United Airlines
Find Deal
Sun, Jul 6 - Wed, Aug 20
Useful Info

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$469
Average price round-trip$1,039
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 24% increase in price.
Flight from Boston to Porto
(price for this month)

When to book flights with United Airlines to Porto

Average price per month
Flight prices as travel date approaches

FAQs for flying to Porto with United Airlines

  • Which other airlines fly to Porto?

    Along with United Airlines, you can also fly to Porto with TAP AIR PORTUGAL.

  • Which airport do United Airlines flights to Porto fly into?

    You’ll fly into Porto Airport when flying to Porto with United Airlines.

  • Are there any other airlines in Star Alliance that fly to Porto?

    The only other Star Alliance airline flying to Porto is TAP AIR PORTUGAL.

United Airlines customer reviews

7.4
GoodBased on 8,696 verified guest reviews
6.6Food
7.7Boarding
8.1Crew
7.3Comfort
7.1Entertainment
Pros +
Cons -
Show reviews that mention
Traveler rating:
Sort by:
A
8.0 Very good
Everything
D
10.0 Wonderful
No issues, great flight, great crew
V
10.0 Wonderful
Friendly crew, all very smooth
V
8.0 Very good
Crew friendly and efficient. Nobody seated next to me
B
2.0 Poor
Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy
A
10.0 Wonderful
Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍
A
8.0 Very good
A bit rush for transit. Food and entertainment are not available
A
8.0 Very good
So far so good but food and entertainment are not available for this flight
D
10.0 Wonderful
Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.
L
8.0 Very good
Good
Read more about United Airlines

Everything you need to know for your flight to Porto

Other airlines flying to Porto

Flight deals from the most popular airlines with KAYAK users flying the route
Delta flights to Porto
TAP AIR PORTUGAL flights to Porto
Iberia flights to Porto
Azores Airlines flights to Porto

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.