Our cheapest offers for flights from Ontario to United States

Here you can compare cheap flights from Ontario (ONT) to United States for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to United States. Prices and availability may change at any time.

Flights from Ontario (ONT) to San Francisco (SFO)

	Outbound	Return	Airlines	Baggage	Price
Ontario San Francisco	Outbound 04/12/25 1 Stopover (DEN) F91500, F91093 06h 41min	Return 04/27/25 direct F92678 01h 28min	Frontier Airlines		$154
Best option Ontario San Francisco	Outbound 04/12/25 direct UA0277 01h 28min	Return 04/27/25 direct UA5553 01h 30min	United Airlines	?	$196
Ontario San Francisco	Outbound 04/12/25 1 Stopover (DEN) F92908, F91093 14h 15min	Return 04/27/25 direct F92678 01h 28min	Frontier Airlines		$162

Flights from Ontario (ONT) to Miami (MIA)

	Outbound	Return	Airlines	Baggage	Price
Best option Ontario Miami	Outbound 04/12/25 1 Stopover (DEN) F91500, F91280 25h 10min	Return 04/27/25 1 Stopover (DEN) F91279, F91499 20h 59min	Frontier Airlines		$202
Ontario Miami	Outbound 04/12/25 1 Stopover (DEN) F91500, F91280 25h 10min	Return 04/27/25 1 Stopover (DEN) F91279, F91499 20h 59min	Frontier Airlines		$205
Ontario Miami	Outbound 04/12/25 1 Stopover (IAH) F93132, F91068 28h 59min	Return 04/27/25 2 Stopovers (ATL, IAH) F92483, F91403, F93131 31h 38min	Frontier Airlines	?	$239

Flights from Ontario (ONT) to Las Vegas (LAS)

	Outbound	Return	Airlines	Baggage	Price
Best option Ontario Las Vegas	Outbound 04/12/25 direct F94206 01h 11min	Return 04/27/25 direct F91283 01h 05min	Frontier Airlines	?	$33
Ontario Las Vegas	Outbound 04/12/25 direct F94206 01h 11min	Return 04/27/25 direct F91283 01h 05min	Frontier Airlines	?	$39
Ontario Las Vegas	Outbound 04/12/25 direct F94206 01h 11min	Return 04/27/25 direct F91283 01h 05min	Frontier Airlines		$45

Flights from Ontario (ONT) to Phoenix - Sky Harbor (PHX)

	Outbound	Return	Airlines	Baggage	Price
Ontario Phoenix - Sky Harbor	Outbound 04/12/25 1 Stopover (DEN) F91500, F92105 19h 34min	Return 04/27/25 1 Stopover (LAS) F93483, F94757 08h 51min	Frontier Airlines		$112
Best option Ontario Phoenix - Sky Harbor	Outbound 04/21/25 direct AA1666 01h 15min	Return 05/19/25 direct AA2522 01h 13min	American Airlines	?	$240
Ontario Phoenix - Sky Harbor	Outbound 04/12/25 1 Stopover (DEN) F91500, F92105 19h 34min	Return 04/27/25 1 Stopover (LAS) F93483, F94757 08h 51min	Frontier Airlines		$115

Flights from Ontario (ONT) to Atlanta (ATL)

	Outbound	Return	Airlines	Baggage	Price
Best option Ontario Atlanta	Outbound 04/12/25 1 Stopover (LAS) F91358, F91116 12h 37min	Return 04/27/25 1 Stopover (LAS) F93923, F94757 17h 49min	Frontier Airlines		$214
Ontario Atlanta	Outbound 04/12/25 1 Stopover (IAH) F93132, F91404 17h 50min	Return 04/27/25 1 Stopover (LAS) F93923, F94757 17h 49min	Frontier Airlines	?	$216
Ontario Atlanta	Outbound 04/12/25 1 Stopover (LAS) F91358, F91116 12h 37min	Return 04/27/25 1 Stopover (LAS) F93923, F94757 17h 49min	Frontier Airlines		$218

Flights from Ontario (ONT) to Dallas (DFW)

	Outbound	Return	Airlines	Baggage	Price
Best option Ontario Dallas	Outbound 04/12/25 direct F91406 03h 14min	Return 04/27/25 direct F92923 03h 24min	Frontier Airlines	?	$92
Ontario Dallas	Outbound 04/12/25 direct F91406 03h 14min	Return 04/27/25 direct F92923 03h 24min	Frontier Airlines		$95
Ontario Dallas	Outbound 04/12/25 direct F91406 03h 14min	Return 04/27/25 direct F92923 03h 24min	Frontier Airlines	?	$127

Flights from Ontario (ONT) to New York (LGA)

	Outbound	Return	Airlines	Baggage	Price
Ontario New York	Outbound 04/12/25 2 Stopovers (LAS, CLE) F91358, F94966, F93092 22h 38min	Return 04/27/25 2 Stopovers (ATL, IAH) F93287, F91403, F93131 34h 12min	Frontier Airlines	?	$241
Ontario New York	Outbound 04/12/25 1 Stopover (DEN) UA1942, UA1333 06h 55min	Return 04/27/25 1 Stopover (IAH) UA1128, UA1563 28h 46min	United Airlines	?	$463
Best option Ontario New York	Outbound 04/26/25 1 Stopover (IAH) UA0722, UA1297 10h 05min	Return 05/23/25 1 Stopover (IAH) UA1949, UA1563 08h 36min	United Airlines	?	$521

Flights from Ontario to United States

Our cheapest offers for flights from Ontario to United States

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