$153 Cheap Flights from Ontario Intl. Airport (ONT) to Greenville (GSP)
Popular airlines from Ontario Intl. Airport (ONT) to Greenville-Spartanburg Intl. Airport (GSP)
American AirlinesAmerican Airlines
UnitedUnited
DeltaDelta
Southwest AirlinesSouthwest Airlines
Alaska AirlinesAlaska Airlines
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Cheap Flights from Ontario to Greenville (ONT-GSP)
Alternative airports near Greenville
Prices were available within the past 7 days. Prices and availability are subject to change.
Find the cheapest month to fly from Ontario (ONT) to Greenville (GSP)
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Ontario (ONT) to Greenville (GSP) at a glance
Travel between Ontario (ONT) and Greenville (GSP) with a selection of airlines catering to this domestic short-haul route. Whether you prefer full-service options or are on the lookout for cheap flights from Ontario, you can easily compare your choices to discover the itinerary that aligns perfectly with your budget and schedule. Get ready to explore the renowned attractions and neighborhoods of Greenville as you review the essential details for flights from Los Angeles - Ontario International Airport to Greenville-Spartanburg International Airport.
- Fastest flight duration: around 5h 15m in-flight, plus roughly 1h 30m layover with one stop
- Route distance: roughly 2,000 miles (3,220 km)
- Flights per week: around 9 departures on average
- Typical fares (one-way): economy tickets often range from $155–$535, depending on seasonality and how far ahead you book
Flights from Los Angeles - Ontario International Airport (ONT) to Greenville-Spartanburg International Airport (GSP)
Recent travel bookings reveal the top airlines flying from Ontario to Greenville, favored for their one-stop services. Common layover points include Dallas-Fort Worth International Airport (DFW) with approximately 1 hour and 30 minutes, Hartsfield-Jackson Atlanta International Airport (ATL) at about 1 hour and 45 minutes, and Charlotte-Douglas International Airport (CLT) also around 1 hour and 30 minutes. This allows travelers the flexibility to choose itineraries based on price, total travel time, and cabin class.
- American Airlines: This full-service airline provides one-stop flights, capturing around 47% of departures on this route. One-way ticket prices generally fall between $155 and $535, with a flight duration of 5 hours and 15 minutes, leading to an overall travel time of about 7 hours, including layover.
- Delta: Offering one-stop service, this full-service airline accounts for approximately 24% of the flights on this route. One-way fares typically range from $155 to $685, with an in-flight time of 5 hours and 15 minutes and a total journey time of roughly 7 hours, factoring in the layover.
- United: As a full-service carrier, United provides one-stop flights, making up about 19% of departures on this route. One-way fares usually range from $155 to $610. Passengers can expect an in-flight duration of 5 hours and 15 minutes, culminating in a total travel time of around 7 hours, including any layover.
- Southwest Airlines: This low-cost carrier offers one-stop service, representing nearly 10% of the departures on this route. One-way ticket prices typically range from $155 to $565. The in-flight experience lasts about 5 hours and 15 minutes, leading to an overall journey time of close to 7 hours, including the layover.
Best time to fly from Ontario (ONT) to Greenville (GSP)
The most popular months for travelers flying from Ontario to Greenville are January, March, and April, when peak temperatures in Greenville reach up to 59.9°F in April. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 72.3°F and typically the lowest average one-way fare (around $256). Flight availability peaks in June and July, with approximately 11 flights per week, making it easier to find convenient departure times. January and February have the fewest flights, with approximately 8 flights per week.
- Cheapest time to fly: September usually offers good deals with average one-way fare around $256, roughly 15% cheaper than the yearly average.
- More budget-friendly months to fly: November, August, and October typically offer average one-way fares of around $266.
- Most flight options: June and July have the highest number of flights from Ontario to Greenville, with approximately 11 flights per week, giving you more flexibility in scheduling your trip.
| Month | Temperature | Demand | Weekly Flights | Average one-way Fare |
| January | 41.4°F (5.2°C) | High | 8 | $317 |
| February | 45.3°F (7.4°C) | Average | 8 | $374 |
| March | 51.8°F (11.0°C) | High | 9 | $333 |
| April | 59.9°F (15.5°C) | High | 10 | $289 |
| May | 68.4°F (20.2°C) | Average | 10 | $320 |
| June | 76.1°F (24.5°C) | Low | 11 | $341 |
| July | 79.5°F (26.4°C) | Average | 11 | $279 |
| August | 77.5°F (25.3°C) | Average | 10 | $268 |
| September | 72.3°F (22.4°C) | Low | 10 | $256 |
| October | 61.9°F (16.6°C) | Average | 10 | $271 |
| November | 51.1°F (10.6°C) | Average | 10 | $261 |
| December | 45.3°F (7.4°C) | Low | 9 | $336 |
*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.
Alternative route from Ontario (ONT) to Greenville (GSP)
- Orange County to Greenville (SNA-GSP): John Wayne Airport (SNA) is approximately 31 miles from Los Angeles - Ontario International Airport (ONT). One-way economy ticket prices for this journey usually fall between $145 and $535, influenced by factors such as the time of year and when you book. This route is commonly served by both one-stop and multi-stop flights, with frequent layovers at Dallas-Fort Worth International Airport (DFW) and Hartsfield-Jackson Atlanta International Airport (ATL). Major airlines operating on this route include American Airlines and Delta, and there are also first-class service options available.
How to find the best prices for flights from Ontario (ONT) to Greenville (GSP)
Getting some of the best deals on flights from Ontario to Greenville is all about timing and flexibility. Here are some key tips to help you save:
- Best times to book and fly: cheaper fares are typically found when booking at least two months in advance, although most travelers reserve their flights 2 to 8 weeks ahead. Afternoon departures from 12 PM to 6 PM usually offer lower prices, even though morning flights from 5 AM to 12 PM are more popular. Additionally, flying on Tuesday often results in cheaper rates, while Wednesday is the busiest 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 Greenville 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 Greenville-Spartanburg International Airport from Los Angeles - Ontario International Airport
Greenville welcomes travelers from Ontario with a range of transport options based on price, convenience, and proximity. Greenville city center is approximately a 20-minute drive (covering about 16 miles) from Greenville-Spartanburg International Airport, depending on traffic. Here's how to reach Greenville efficiently:
- Hotel transfer: Transfers offer a convenient way to reach your hotel in Greenville, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
- Car rental: Renting a car from Greenville-Spartanburg International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Greenville-Spartanburg International 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.
Ontario Intl. Airport to Greenville Flights
The cheapest times to fly from Ontario Intl. Airport to Greenville
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 Greenville are during the month of October. You can find some of the cheapest flights from Ontario Intl. Airport to Greenville with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Ontario Intl. Airport to Greenville
Sunday is one of the best days to book for cheap flights from Ontario Intl. Airport to Greenville: 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 Greenville
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 Greenville in 2026. You can also book with separate airlines for your outbound and return journeys, from $153 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 Greenville 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 Greenville 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.) cost?
You can find cheap one-way flights from $153 and cheap return flights $305 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.) with Expedia. One-way flights usually range from $201 to $801, and return flights typically cost between $423 and $1434. 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.) 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
April is the cheapest month to fly from Ontario, CA (ONT) to Greenville, SC (GSP), with average round-trip fares around $419. This is about 14% lower than the average price throughout the year, as travel demand is generally lower in spring. Other cheap months to fly from Ontario to Greenville include February and June.
*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
Enter ONT to GSP and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
To find a cheap flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.), 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
The ideal months to fly from Ontario, CA (ONT) to Greenville, SC (GSP) are April and June. April features an average price of around $419 for a return flight, making it a cost-effective choice. June is also popular, providing a great opportunity to enjoy the summer weather while still finding reasonable fares.
*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
The earliest flight from Ontario, California (ONT) to Greenville, South Carolina (GSP) typically departs at around 12:55 AM, operated by American Airlines. This is a seasonal service active in November, and an early flight can help you maximize your time in Greenville. 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
The most popular departure times for flights from Ontario, CA (ONT) to Greenville, SC (GSP) are in the early morning, from 6am to 9am. About 30% of passengers prefer this time window. Many major carriers, including United Airlines and American Airlines, offer flights during this window. This timing works well because it allows you to arrive in Greenville with plenty of time to start your day.
How long does it take to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
A flight from ONT to GSP with a layover takes around 7 hours, with the route covering approximately 2,005 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
You can fly first class between ONT and GSP. First class cabins are available on:
- Delta Air Lines
- American Airlines
- United Airlines
How do I earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.) flight with Expedia?
It's easy to earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.) 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 Greenville from Los Angeles - Ontario Intl. (ONT)?
From Los Angeles - Ontario Intl. (ONT), you can fly into Mid Delta Regional (GLH), Greenville-Spartanburg Intl. (GSP) and Pitt-Greenville (PGV) in Greenville. 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.) at the last minute?
Typically, booking a last minute flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.) 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.) flight and hotel package?
Securing a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.) 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 Greenville, SC (GSP-Greenville-Spartanburg Intl.)?
If you booked your Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Greenville, SC (GSP-Greenville-Spartanburg Intl.) 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 | Greenville-Spartanburg Intl. Airport |
Distance | 2,004 miles away |
Airlines serving | American Airlines, United, Delta, Southwest Airlines, Alaska Airlines |
Popular airline | American Airlines |
Roundtrip price | $305 |