Find cheap United Airlines flights to Portugal
ICT — LIS
Nov 4 — Nov 111
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Leverage Cheapflights for Your Next Trip
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.Find United Airlines flight deals to Portugal
Cheapest
Best
Direct
Last-minute
One-way
Cheapest United Airlines flights from USA to PortugalExplore the most affordable United Airlines flight options available from USA to Portugal. Find the lowest fares with prices last updated on October 5, 2026.
Explore the most affordable United Airlines flight options available from USA to Portugal. Find the lowest fares with prices last updated on October 5, 2026.
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 11/296:00 am -
1 stop23h 05m
Tue 12/812:50 pm -
1 stop33h 03m
Deal found 9/30![United Airlines logo]()
$641
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.
Thu 11/126:00 am -
1 stop23h 20m
Wed 11/1811:20 am -
2 stops34h 40m
Deal found 10/1![United Airlines logo]()
$646
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 11/105:15 pm -
2 stops32h 40m
Tue 11/1712:50 pm -
2 stops31h 01m
Deal found 9/30![United Airlines logo]()
$649
Best United Airlines flights from USA to PortugalDiscover carefully curated United Airlines flight deals from USA to Portugal 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 United Airlines flight deals from USA to Portugal 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.
Sun 11/159:12 am -
2 stops19h 18m
Tue 11/2412:35 pm -
2 stops26h 43m
Deal found 10/3![United Airlines logo]()
$683
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.
Fri 12/112:58 pm -
2 stops36h 57m
Sat 1/911:20 am -
2 stops31h 38m
Deal found 9/30![United Airlines logo]()
$684
This United Airlines deal was found by Cheapflights users on 10/5. 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.
Thu 11/268:25 pm -
Nonstop6h 45m
Sat 12/510:15 am -
Nonstop8h 10m
Deal found 10/5![United Airlines logo]()
$688
Direct United Airlines flights from USA to PortugalExplore non-stop United Airlines flight options from USA to Portugal based on user searches, and compare prices and availability for your desired travel dates. Data last updated October 5, 2026.
Explore non-stop United Airlines flight options from USA to Portugal based on user searches, and compare prices and availability for your desired travel dates. Data last updated October 5, 2026.
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.
Thu 10/299:25 pm -
Nonstop6h 45m
Thu 12/1010:15 am -
Nonstop8h 10m
Deal found 9/30![United Airlines logo]()
$651
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.
Mon 10/269:25 pm -
Nonstop6h 45m
Wed 11/410:15 am -
Nonstop8h 10m
Deal found 10/1![United Airlines logo]()
$652
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:25 pm -
Nonstop6h 45m
Wed 11/1110:15 am -
Nonstop8h 10m
Deal found 10/4![United Airlines logo]()
$675
Last-minute United Airlines flights from USA to PortugalDiscover last-minute United Airlines flight deals from USA to Portugal. Data last updated October 5, 2026 and is based on user searches.
Discover last-minute United Airlines flight deals from USA to Portugal. Data last updated October 5, 2026 and is based on user searches.
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 11/296:00 am -
1 stop23h 05m
Tue 12/812:50 pm -
1 stop33h 03m
Deal found 9/30![United Airlines logo]()
$641
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.
Thu 11/126:00 am -
1 stop23h 20m
Wed 11/1811:20 am -
2 stops34h 40m
Deal found 10/1![United Airlines logo]()
$646
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 11/105:15 pm -
2 stops32h 40m
Tue 11/1712:50 pm -
2 stops31h 01m
Deal found 9/30![United Airlines logo]()
$649
One-way United Airlines flights to PortugalSearch for one-way United Airlines flight options to Portugal. Find affordable one-way fares based on user searches. Data last updated October 5, 2026.
Search for one-way United Airlines flight options to Portugal. Find affordable one-way fares based on user searches. Data last updated October 5, 2026.
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/289:35 am -
2 stops18h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![United Airlines logo]()
$364
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.
Tue 3/3010:44 am -
2 stops18h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![United Airlines logo]()
$403
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 11/158:25 pm -
Nonstop6h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![United Airlines logo]()
$414
Flights to Portugal with United Airlines at a glance
Find detailed information about United Airlines flights from USA to Portugal. Explore the options provided by United Airlines to plan your journey from USA to Portugal. Data last updated October 5, 2026.
Cheapflights Insights
Find cheap United Airlines flights to Portugal
US0-PT0
EWR-LIS
BOS-OPO
BOS-LIS
How long is the flight to Portugal with United Airlines?
On average, United Airlines flights from the United States to Portugal take 6 hours 56 minutes. Flights to Portugal from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.
United Airlines weekly flight availability to Portugal
The most flights to Portugal operated by United Airlines are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).
When is the best time to book a flight to Portugal with United Airlines?
The best time to book a flight to Portugal with United Airlines is 10 days before departure. On average, fares are higher if you book 87 days before departure.
FAQs for United Airlines flights to Portugal
Reviews from United Airlines flights to Portugal
See what other users thought of their United Airlines experience.
Overview
Reviews
United Airlines
10,000 reviews
Overview
Boarding
7.7
Comfort
7.3
Crew
8.1
Food
6.7
Entertainment
7.1
Recent reviews
10.0
|Oct 2026Is good
10.0
|Sep 2026Everything was good
8.0
|Sep 2026The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
10.0
|Aug 2026Staff friendly, good boarding experience
4.0
|Aug 2026Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
1 out of 3334
Popular United Airlines flights
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Complete your trip
Flights by cabin class
Fly from Portugal
Other countries
Popular destinations
Popular flights
Popular Portugal flight routes
Popular regions
Popular routes
Top Portugal destinations
United Airlines