$523 Cheap Flights from Dublin (DUB) to Tri-Cities (TRI)

View $523 flight on Tue, Dec 15, 2026Opens in a new window

Popular airlines from Dublin Airport (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)

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Cheap Flights from Dublin to Tri-Cities (DUB-TRI)

Prices were available within the past 7 days and start at $523 for one-way flights and $913 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, Sep 14 - Mon, Sep 28
DUB
Dublin
TRI
Tri-Cities
$913 Roundtrip, found 1 day ago
$913
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Mon, Sep 14 from Dublin to Tri-Cities, returning Mon, Sep 28, priced at $913 found 1 day ago
Aer Lingus
Mon, Sep 14 - Mon, Sep 28
DUB
Dublin
TRI
Tri-Cities
$1,071 Roundtrip, found 1 day ago
$1,071
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Mon, Sep 14 from Dublin to Tri-Cities, returning Mon, Sep 28, priced at $1,071 found 1 day ago
Aer Lingus
Mon, Sep 14 - Mon, Sep 28
DUB
Dublin
TRI
Tri-Cities
$1,126 Roundtrip, found 1 day ago
$1,126
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Mon, Sep 14 from Dublin to Tri-Cities, returning Mon, Sep 28, priced at $1,126 found 1 day ago
Aer Lingus
Mon, Sep 14 - Mon, Sep 28
DUB
Dublin
TRI
Tri-Cities
$1,404 Roundtrip, found 1 day ago
$1,404
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Mon, Sep 14 from Dublin to Tri-Cities, returning Mon, Sep 28, priced at $1,404 found 1 day ago
Aer Lingus
Mon, Sep 14 - Mon, Sep 28
DUB
Dublin
TRI
Tri-Cities
$1,562 Roundtrip, found 1 day ago
$1,562
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Mon, Sep 14 from Dublin to Tri-Cities, returning Mon, Sep 28, priced at $1,562 found 1 day ago
Aer Lingus
Mon, Sep 14 - Mon, Sep 28
DUB
Dublin
TRI
Tri-Cities
$1,618 Roundtrip, found 1 day ago
$1,618
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Mon, Sep 14 from Dublin to Tri-Cities, returning Mon, Sep 28, priced at $1,618 found 1 day ago

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Frequently asked questions

How much does a flight from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) cost?
You can find cheap one-way flights from $523 and cheap return flights from $913 Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) with Expedia. Roundtrip flights usually range from $945 to $3619. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The cheapest month to fly from DUB to TRI is September when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
Enter DUB to TRI and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
To find a cheap flight from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The earliest flight from Dublin Airport (DUB) to Tri-Cities Regional Airport (TRI) typically departs at around 5:55 AM, operated by KLM and Delta. This flight is a seasonal service active in December, allowing you to start your day early and enjoy your time in Tennessee. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
Flying from DUB to TRI with a connection usually takes about 16 hours 30 minutes, traveling roughly 3,710 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
Select the "Business class" and "First class" filters when looking for DUB to TRI flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight with Expedia?
It's easy to earn miles on a Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Tri-Cities from DUB (DUB)?
If you're planning to travel to Tri-Cities from DUB (DUB), you can fly into Tri-Cities Regional (TRI) Some flights may connect through major hubs like Heathrow (LHR), Philadelphia Intl. (PHL), Logan Intl. (BOS) before reaching Tri-Cities. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) at the last minute?
Typically, booking a last minute flight from Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight and hotel package?
Securing a Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays 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 Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
If you booked your Dublin (DUB) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Dublin
Destination airport
Tri-Cities Regional
Roundtrip price
$912
Distance
3710 mi

Book with confidence

Dublin to Tri-Cities Flights

The cheapest times to fly from Dublin to Tri-Cities

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Dublin to Tri-Cities are during the month of September. You can find some of the cheapest flights from Dublin to Tri-Cities with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Dublin to Tri-Cities

Sunday is one of the best days to book for cheap flights from Dublin to Tri-Cities: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Dublin to Tri-Cities

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Dublin to Tri-Cities in 2026. You can also book with separate airlines for your outbound and return journeys, from $523 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Dublin to Tri-Cities flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Dublin to Tri-Cities airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Dublin to Tri-Cities Flights

*Flight schedules are subject to change.

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*Available to One Key members.