$126 Cheap United flights Las Vegas (LAS) to Ontario (ONT)

View $126 flight on Sat, Feb 14, 2026Opens in a new window

$126 Cheap United flights Las Vegas (LAS) to Ontario (ONT)

Prices were available within the past 7 days and start at $126 for one-way flights and $397 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Jan 25 - Tue, Jan 27
LAS
Las Vegas
ONT
Ontario
$397 Roundtrip, found 1 day ago
$397
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from Las Vegas to Ontario, returning Tue, Jan 27, priced at $397 found 1 day ago
United
Sun, Jan 25 - Tue, Jan 27
LAS
Las Vegas
ONT
Ontario
$448 Roundtrip, found 1 day ago
$448
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from Las Vegas to Ontario, returning Tue, Jan 27, priced at $448 found 1 day ago
United
Sun, Jan 25 - Tue, Jan 27
LAS
Las Vegas
ONT
Ontario
$477 Roundtrip, found 1 day ago
$477
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from Las Vegas to Ontario, returning Tue, Jan 27, priced at $477 found 1 day ago
United
Sun, Jan 25 - Tue, Jan 27
LAS
Las Vegas
ONT
Ontario
$538 Roundtrip, found 1 day ago
$538
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from Las Vegas to Ontario, returning Tue, Jan 27, priced at $538 found 1 day ago
United
Sun, Jan 25 - Tue, Jan 27
LAS
Las Vegas
ONT
Ontario
$541 Roundtrip, found 1 day ago
$541
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from Las Vegas to Ontario, returning Tue, Jan 27, priced at $541 found 1 day ago
United
Sun, Jan 25 - Tue, Jan 27
LAS
Las Vegas
ONT
Ontario
$548 Roundtrip, found 1 day ago
$548
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from Las Vegas to Ontario, returning Tue, Jan 27, priced at $548 found 1 day ago
United
Sun, Jan 25 - Tue, Jan 27
LAS
Las Vegas
ONT
Ontario
$562 Roundtrip, found 1 day ago
$562
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from Las Vegas to Ontario, returning Tue, Jan 27, priced at $562 found 1 day ago
United
Sun, Jan 25 - Tue, Jan 27
LAS
Las Vegas
ONT
Ontario
$592 Roundtrip, found 1 day ago
$592
Roundtrip
found 1 day ago
Select United flight, departing Sun, Jan 25 from Las Vegas to Ontario, returning Tue, Jan 27, priced at $592 found 1 day ago

Find the cheapest month to fly from Las Vegas (LAS) to Ontario (ONT)

October is typically the cheapest month to fly

From $48 - $129 per traveler.

Alternative airports near Ontario

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

Select flight to Los Angeles - Ontario Intl. ONT. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $67
ONT
Los Angeles - Ontario Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $67
Flights from Las Vegas (LAS) to Ontario (ONT)
Origin airport
Harry Reid Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
American Airlines, Frontier Airlines, Southwest Airlines, United
Popular airline
Frontier Airlines
Distance
314 km
Average flight time
1 hour 4 mins