EUR/IE
Find cheap flights to Ontario, California in 2025/2026 from €510 This is the cheapest return flight found to Ontario, California from Ireland on FlightsFinder on May 24th 2025 at 09:28. This offer may no longer be available. Click the offer to check live prices & dates of travel.
Our Flight Finder compares the cheapest flights to Ontario, California from the most established flight comparison sites.
Fly to Ontario, California and visit sites like Planes of Fame Air Museum, Cucamonga-Guasti Regional Park, Jurupa Mountains Discovery Center & Yanks Air Museum.
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These economy flights were found on FlightsFinder from Ireland to Ontario, California in the last few days. Prices subject to availability.
These economy flights were found on FlightsFinder from Ireland to Ontario, California in the last few days. Prices subject to availability.
According to our data, June is on average the cheapest time to book flights to Ontario, California.
You can get flights from €510 return.
According to our data, April is on average the most expensive time to book flights to Ontario, California.
A return flight could set you back more than €1,085.
Located in Southern California, Ontario is a vibrant city known for its diverse culture, rich history, and flourishing economy. With its proximity to major attractions such as the Ontario Mills shopping mall and the Toyota Arena, Ontario offers a perfect blend of urban excitement and natural beauty. The city boasts a range of outdoor recreational activities, including hiking in the nearby Mount Baldy and exploring the picturesque Cucamonga Wilderness. Whether you're a food enthusiast, outdoor adventurer, or history buff, Ontario has something to offer everyone, making it a truly dynamic destination worth exploring.
26.9 °C
Tue, 27 May 2025
Average Temperature
18°C
Jan
19°C
Feb
21°C
Mar
23°C
Apr
26°C
May
30°C
Jun
33°C
Jul
34°C
Aug
32°C
Sep
27°C
Oct
23°C
Nov
19°C
Dec
Dublin, Ireland - Dublin International Airport (DUB) to Ontario, California (ONT)
Distance:
5,136 miles (8,265 kilometres)
Average flight time (direct 11 hours 54 minutes)
Shannon, Ireland - Shannon International Airport (SNN) to Ontario, California (ONT)
Distance:
5,075 miles (8,168 kilometres)
Average flight time (direct 11 hours 46 minutes)
Knock, Ireland - Ireland West Airport (NOC) to Ontario, California (ONT)
Distance:
5,031 miles (8,097 kilometres)
Average flight time (direct 11 hours 40 minutes)
Cork, Ireland - Cork International Airport (ORK) to Ontario, California (ONT)
Distance:
5,125 miles (8,248 kilometres)
Average flight time (direct 11 hours 53 minutes)
Kerry, Ireland - Kerry Airport (KIR) to Ontario, California (ONT)
Distance:
5,075 miles (8,168 kilometres)
Average flight time (direct 11 hours 46 minutes)
Donegal, Ireland - Donegal Airport (CFN) to Ontario, California (ONT)
Distance:
5,002 miles (8,050 kilometres)
Average flight time (direct 11 hours 36 minutes)
Waterford, Ireland - Waterford Airport (WAT) to Ontario, California (ONT)
Distance:
5,159 miles (8,303 kilometres)
Average flight time (direct 11 hours 57 minutes)
From Dublin (DUB), Ireland to Ontario, United States (ONT): €510
Depart: 17 Jun 2025 · Return: 17 Sep 2025 Price found 24 May 2025, 09:28
From Shannon (SNN), Ireland to Ontario, United States (ONT): €630
Depart: 27 Aug 2025 · Return: 03 Sep 2025 Price found 26 May 2025, 15:13
From Cork (ORK), Ireland to Ontario, United States (ONT): €645
Depart: 29 Oct 2025 · Return: 05 Nov 2025 Price found 24 May 2025, 20:28
From Knock (NOC), Ireland to Ontario, United States (ONT): €816
Depart: 13 Jun 2025 · Return: 17 Jun 2025 Price found 27 May 2025, 14:25
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