$431 Cheap Flights from Tri-Cities (TRI) to Lisbon (LIS)

View $431 flight on Fri, May 8, 2026Opens in a new window

Popular airlines from Tri-Cities, TN (TRI-Tri-Cities Regional) to Humberto Delgado Airport (LIS)

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Cheap Flights from Tri-Cities to Lisbon (TRI-LIS)

Prices were available within the past 7 days and start at $431 for one-way flights and $609 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, Nov 2 - Thu, Nov 13
TRI
Tri-Cities
LIS
Lisbon
$609 Roundtrip, found 1 day ago
$609
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Nov 2 from Tri-Cities to Lisbon, returning Thu, Nov 13, priced at $609 found 1 day ago
American Airlines
Tue, Nov 4 - Wed, Nov 26
TRI
Tri-Cities
LIS
Lisbon
$613 Roundtrip, found 1 day ago
$613
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 4 from Tri-Cities to Lisbon, returning Wed, Nov 26, priced at $613 found 1 day ago
American Airlines
Tue, Nov 4 - Wed, Nov 26
TRI
Tri-Cities
LIS
Lisbon
$618 Roundtrip, found 1 day ago
$618
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 4 from Tri-Cities to Lisbon, returning Wed, Nov 26, priced at $618 found 1 day ago
American Airlines
Tue, Nov 4 - Wed, Nov 26
TRI
Tri-Cities
LIS
Lisbon
$624 Roundtrip, found 1 day ago
$624
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 4 from Tri-Cities to Lisbon, returning Wed, Nov 26, priced at $624 found 1 day ago
American Airlines
Tue, Nov 4 - Wed, Nov 26
TRI
Tri-Cities
LIS
Lisbon
$626 Roundtrip, found 1 day ago
$626
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 4 from Tri-Cities to Lisbon, returning Wed, Nov 26, priced at $626 found 1 day ago
Virgin Atlantic
Sat, Nov 8 - Thu, Nov 27
TRI
Tri-Cities
LIS
Lisbon
$626 Roundtrip, found 3 days ago
$626
Roundtrip
found 3 days ago
Select Virgin Atlantic flight, departing Sat, Nov 8 from Tri-Cities to Lisbon, returning Thu, Nov 27, priced at $626 found 3 days ago
American Airlines
Tue, Nov 4 - Wed, Nov 26
TRI
Tri-Cities
LIS
Lisbon
$628 Roundtrip, found 1 day ago
$628
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 4 from Tri-Cities to Lisbon, returning Wed, Nov 26, priced at $628 found 1 day ago
Delta
Tue, Nov 4 - Thu, Nov 13
TRI
Tri-Cities
LIS
Lisbon
$628 Roundtrip, found 1 day ago
$628
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Nov 4 from Tri-Cities to Lisbon, returning Thu, Nov 13, priced at $628 found 1 day ago
KLM
Mon, Nov 3 - Fri, Nov 28
TRI
Tri-Cities
LIS
Lisbon
$661 Roundtrip, found 3 days ago
$661
Roundtrip
found 3 days ago
Select KLM flight, departing Mon, Nov 3 from Tri-Cities to Lisbon, returning Fri, Nov 28, priced at $661 found 3 days ago
Air France
Thu, Nov 13 - Mon, Nov 17
TRI
Tri-Cities
LIS
Lisbon
$948 Roundtrip, found 6 days ago
$948
Roundtrip
found 6 days ago
Select Air France flight, departing Thu, Nov 13 from Tri-Cities to Lisbon, returning Mon, Nov 17, priced at $948 found 6 days ago

Alternative airports near Lisbon

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Humberto Delgado LIS. Cheapest option available. Flights from $1,070
LIS
Humberto Delgado
Cheapest
Flights from $1,070
Flights from Tri-Cities (TRI) to Lisbon (LIS)
Origin airport
Tri-Cities Regional
Destination airport
Humberto Delgado
Airlines serving
Air France, American Airlines, Delta, KLM, Scandinavian Airlines, Virgin Atlantic
Roundtrip price
$609
Distance
3900 mi

Frequently asked questions

How much does a flight from Tri-Cities Regional Airport (TRI) to Humberto Delgado Airport (LIS) cost?
Discover the latest flight deals from TRI to LIS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from TRI to LIS?
The cheapest flights from TRI to LIS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from TRI to LIS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from TRI to LIS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Tri-Cities Regional Airport (TRI) to Humberto Delgado Airport (LIS)?
You'll need to take a flight with a layover when traveling from Tri-Cities Regional Airport (TRI) to Humberto Delgado Airport (LIS). There are no daily direct flights on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from TRI to LIS?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on various factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Tri-Cities Regional Airport (TRI) to Humberto Delgado Airport (LIS)?
Opt for a flight from Tri-Cities Regional Airport (TRI) to Humberto Delgado Airport (LIS) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**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 Tri-Cities Regional Airport (TRI) to Humberto Delgado Airport (LIS) last-minute?
Last-minute fares from TRI to LIS are typically more expensive. For the best rates, start searching for flights well in advance. That said, if you're flexible with your travel dates, it's possible to score a cheap ticket right before your trip.
Is it cheaper to book a TRI to LIS flight and hotel package?
Securing a TRI to LIS flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Pick from our impressive range of accommodations and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Tri-Cities Regional Airport (TRI) to Humberto Delgado Airport (LIS)?
In most instances, you can modify or cancel your TRI to LIS flight. However, there may be additional fees, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you'd like further details, head to our Customer Service portal.

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