$369 Cheap Flights from Ontario Intl. Airport (ONT) to Tri-Cities (TRI)
Popular airlines from Ontario Intl. Airport (ONT) to Tri-Cities, TN (TRI-Tri-Cities Regional)
American AirlinesAmerican Airlines
DeltaDelta
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Cheap Flights from Ontario to Tri-Cities (ONT-TRI)
Alternative airports
Prices were available within the past 7 days. Prices and availability are subject to change.
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Ontario (ONT) to Tri-Cities (TRI) at a glance
Embark on a journey from Ontario (ONT) to Tri-Cities (TRI) with a selection of airlines catering to this domestic short-haul route. Explore various options from full-service carriers to find the itinerary that aligns with your budget, schedule, and travel needs as you discover the iconic sights and neighborhoods of Tri-Cities. Here, you’ll find essential information for flights departing from Los Angeles - Ontario International Airport (ONT) to Tri-Cities Regional Airport (TRI).
- Fastest flight duration: around 5h 15m in-flight, plus roughly 1h 45m layover with one stop
- Route distance: roughly 2,000 miles (3,220 km)
- Flights per week: around 8 departures on average
- Typical fares (one-way): economy tickets often range from $160–$475, depending on seasonality and how far ahead you book
Flights from Los Angeles - Ontario International Airport (ONT) to Tri-Cities Regional Airport (TRI)
Based on the latest traveler bookings, here are the top airlines flying from Ontario to Tri-Cities, favored for their one-stop services. Common layover options include Dallas-Fort Worth International Airport (DFW) with a layover of about 1 hour and 30 minutes, Hartsfield-Jackson Atlanta International Airport (ATL) with approximately 2 hours and 15 minutes, and Charlotte-Douglas International Airport (CLT) with around 3 hours of layover time. This variety allows you to customize your itinerary based on price, total travel time, and cabin class.
- American Airlines: This full-service airline provides one-stop flights, with one-way ticket prices generally ranging from $160 to $480. It makes up about 65% of departures on this route, featuring an in-flight duration of 5 hours and 15 minutes, and a total travel time of around 7 hours, including layover.
- Delta: Offering one-stop services, this full-service carrier has one-way fares that typically fall between $170 and $460. Delta accounts for roughly 35% of the departures along this route, with a flight time of 5 hours and 15 minutes, leading to an overall journey duration of approximately 7 hours, including layover time.
Alternative routes from Ontario (ONT) to Tri-Cities (TRI)
- Ontario to Asheville (ONT-AVL): Asheville Regional Airport (AVL) is located approximately 72 miles from Tri-Cities Regional Airport (TRI). One-way economy ticket prices on this route generally fall between $150 and $480, influenced by the travel season and how early you book. Flights on this route are mostly available as one-stop options, with common layover points at Hartsfield-Jackson Atlanta International Airport (ATL) and Dallas-Fort Worth International Airport (DFW). Major airlines operating here include Delta and American Airlines, with first-class service also offered.
- Orange County to Tri-Cities (SNA-TRI): John Wayne Airport (SNA) is roughly 31 miles from Los Angeles - Ontario International Airport (ONT). The cost for one-way economy fares on this route typically ranges from $175 to $640, depending on the season and advance booking. Travelers can choose from both one-stop and multi-stop flight options, with popular layover locations at Charlotte-Douglas International Airport (CLT) and Dallas-Fort Worth International Airport (DFW). Leading airlines for this route include American Airlines and Delta.
How to find the best prices for flights from Ontario (ONT) to Tri-Cities (TRI)
Getting some of the best deals on flights from Ontario to Tri-Cities is all about timing and flexibility. Here are some key tips to help you save:
- Best times to book and fly: cheaper fares are usually found when booking 2-8 weeks in advance, which is also when most travelers make their reservations. Evening departures (6 PM to 12 AM) often offer lower prices, while morning flights (5 AM to 12 PM) are more popular. Additionally, flying on Monday generally provides cheaper options, although Wednesday is the most favored travel day.
- Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
- Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Tri-Cities hotel and flight deals.
- Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
- Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
- Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.
*Members only. Savings vary and are not available on all bundles. Select hotels.
Arriving at Tri-Cities Regional Airport from Los Angeles - Ontario International Airport
Tri-Cities welcomes travelers from Ontario with a range of transport options based on price, convenience, and proximity. Here's how to reach Tri-Cities efficiently:
- Hotel transfer: Transfers offer a convenient way to reach your hotel in Tri-Cities, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
- Car rental: Renting a car from Tri-Cities Regional Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Tri-Cities Regional Airport on Expedia.
- Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
- Public transportation: From Tri-Cities Regional Airport, Tri-City Airport Seaport, a seaport, is conveniently located about 0.2 miles away on foot, making it easily accessible for travelers.
Ontario Intl. Airport to Tri-Cities Flights
The cheapest times to fly from Ontario Intl. Airport 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 Ontario Intl. Airport to Tri-Cities are during the month of December. You can find some of the cheapest flights from Ontario Intl. Airport to Tri-Cities with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Ontario Intl. Airport to Tri-Cities
Sunday is one of the best days to book for cheap flights from Ontario Intl. Airport 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 Ontario Intl. Airport 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 Ontario Intl. Airport to Tri-Cities in 2026. You can also book with separate airlines for your outbound and return journeys, from $369 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 Ontario Intl. Airport 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 Ontario Intl. Airport 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.
Frequently Asked Questions
How much does a flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) cost?
You can find cheap one-way flights from $369 and cheap return flights $399 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) with Expedia. One-way flights usually range from $259 to $1046, and return flights typically cost between $590 and $1736. 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The cheapest month to fly from ONT to TRI is December 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
Enter ONT to TRI and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
American Airlines is one of the cheapest airlines offering connecting flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) with tickets starting from around $979, with a layover in Sky Harbor Intl. (PHX). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
To find a cheap flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The earliest flight from Los Angeles - Ontario International Airport (ONT) to Tri-Cities Regional Airport (TRI) typically leaves at around 12:55 AM, operated by American Airlines. This seasonal service is available in December, allowing you to get a head start on your trip. An early departure can help you make the most of your time in Tri-Cities. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The most popular departure times for flights from Ontario, CA (ONT) to Tri-Cities, TN (TRI) are in the early morning, from 6am to 9am. About 37% of passengers prefer this time window. Many major carriers, including American Airlines and United Airlines, offer flights during this window. This timing is popular because it allows you to maximize your day upon arrival.
How long does it take to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
A flight from ONT to TRI with a layover takes around 7 hours 30 minutes, with the route covering approximately 1,981 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
First class seats are offered on the ONT to TRI route with Delta Air Lines and American Airlines.
How do I earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight with Expedia?
It's easy to earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) 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 Los Angeles - Ontario Intl. (ONT)?
From Los Angeles - Ontario Intl. (ONT), you can fly into Tri-Cities Regional (TRI) to reach Tri-Cities. Some flights may connect through major hubs like San Francisco Intl. (SFO), Denver Intl. (DEN), George Bush Intercontinental (IAH) 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) at the last minute?
Typically, booking a last minute flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight and hotel package?
Securing a Ontario, CA (ONT-Los Angeles - Ontario Intl.) 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
If you booked your Ontario, CA (ONT-Los Angeles - Ontario Intl.) 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 | Ontario Intl. Airport |
|---|---|
Destination airport | Tri-Cities, TN |
Distance | 1,980 miles away |
Airlines serving | American Airlines, Delta |
Popular airline | American Airlines |
Roundtrip price | $399 |