Cheap Flights to Ontario

114 deals to Ontario

Ontario California aerial with San Gabriel Mountains
Save 65%
$121
$428
Tulsa Oklahoma Centennial Park and skyline
TULONT
Tulsa to Ontario
Southwest Airlines
Nonstop·round trip
Jun 3 – Jun 9
Ontario California aerial with San Gabriel Mountains
Save 64%
$166
$460
Washington DC monuments and Capitol
IADONT
Washington to Ontario
Frontier Airlines
Nonstop·round trip
May 8 – May 18
Ontario California aerial with San Gabriel Mountains
Save 57%
$62
$144
Las Vegas Strip with Bellagio fountains
LASONT
Las Vegas to Ontario
Frontier Airlines
Nonstop·round trip
Apr 9 – May 26Last Chance
Ontario California aerial with San Gabriel Mountains
Save 55%
$65
$144
Las Vegas Strip with Bellagio fountains
LASONT
Las Vegas to Ontario
Frontier Airlines
Nonstop·round trip
Apr 15 – May 6
Ontario California aerial with San Gabriel Mountains
Save 53%
$141
$299
Austin skyline and Congress Avenue Bridge
AUSONT
Austin to Ontario
Frontier Airlines
Nonstop·round trip
May 9 – May 11
Ontario California aerial with San Gabriel Mountains
Save 50%
$135
$269
Phoenix skyline with desert mountains
PHXONT
Phoenix to Ontario
Frontier Airlines
Nonstop·round trip
May 21 – May 24
Ontario California aerial with San Gabriel Mountains
Save 50%
$158
$316
Memphis Beale Street and skyline
MEMONT
Memphis to Ontario
Frontier Airlines
Nonstop·round trip
Apr 20 – Apr 26
Ontario California aerial with San Gabriel Mountains
Save 50%
$158
$316
Memphis Beale Street and skyline
MEMONT
Memphis to Ontario
Frontier Airlines
Nonstop·round trip
Apr 19 – Apr 23
Ontario California aerial with San Gabriel Mountains
Save 50%
$204
$406
Charlotte skyline
CLTONT
Charlotte to Ontario
Frontier Airlines
Nonstop·round trip
May 17 – Jun 1
Ontario California aerial with San Gabriel Mountains
Save 44%
$116
$207
Denver skyline with Rocky Mountains
DENONT
Denver to Ontario
Frontier Airlines
Nonstop·round trip
May 3 – May 8
Ontario California aerial with San Gabriel Mountains
Save 43%
$186
$324
Cleveland skyline and Rock Hall
CLEONT
Cleveland to Ontario
Frontier Airlines
Nonstop·round trip
Apr 21 – Apr 25
Ontario California aerial with San Gabriel Mountains
Save 41%
$272
$460
Washington DC monuments and Capitol
IADONT
Washington to Ontario
Southwest Airlines
Nonstop·round trip
Apr 21 – Apr 23
Ontario California aerial with San Gabriel Mountains
Save 39%
$204
$336
New York City Manhattan skyline
JFKONT
New York to Ontario
American Airlines
Nonstop·round trip
Apr 17 – Apr 20
Ontario California aerial with San Gabriel Mountains
Save 38%
$103
$166
Dallas skyline aerial view
DFWONT
Dallas to Ontario
Frontier Airlines
Nonstop·round trip
Apr 25 – Apr 26
Ontario California aerial with San Gabriel Mountains
Save 37%
$109
$174
Seattle skyline with Space Needle and Mount Rainier
SEAONT
Seattle to Ontario
Frontier Airlines
Nonstop·round trip
Apr 21 – Apr 25
Ontario California aerial with San Gabriel Mountains
Save 37%
$270
$426
Fort Lauderdale beach aerial
FLLONT
Fort Lauderdale to Ontario
Southwest Airlines
Nonstop·round trip
Apr 21 – Apr 27
Ontario California aerial with San Gabriel Mountains
Save 37%
$311
$494
Rochester New York High Falls at sunset
ROCONT
Rochester to Ontario
United Airlines
Nonstop·round trip
May 6 – May 19
Ontario California aerial with San Gabriel Mountains
Save 36%
$171
$266
Baltimore Inner Harbor at night
BWIONT
Baltimore to Ontario
Frontier Airlines
Nonstop·round trip
May 5 – May 8
Ontario California aerial with San Gabriel Mountains
Save 36%
$377
$593
Jacksonville skyline and St. Johns River
JAXONT
Jacksonville to Ontario
Southwest Airlines
Nonstop·round trip
May 1 – May 8
Ontario California aerial with San Gabriel Mountains
Save 35%
$216
$332
Minneapolis skyline with Stone Arch Bridge
MSPONT
Minneapolis to Ontario
Frontier Airlines
Nonstop·round trip
Apr 19 – Apr 23
Ontario California aerial with San Gabriel Mountains
Save 35%
$302
$464
Albany New York skyline
ALBONT
Albany to Ontario
Southwest Airlines
Nonstop·round trip
Apr 23 – Apr 28
Ontario California aerial with San Gabriel Mountains
Save 33%
$433
$593
Jacksonville skyline and St. Johns River
JAXONT
Jacksonville to Ontario
American Airlines
Nonstop·round trip
Jun 2 – Jun 9
Ontario California aerial with San Gabriel Mountains
Save 32%
$241
$356
Boston skyline and harbor
BOSONT
Boston to Ontario
American Airlines
Nonstop·round trip
May 5 – May 6
Ontario California aerial with San Gabriel Mountains
Save 32%
$317
$468
Nashville skyline with Broadway
BNAONT
Nashville to Ontario
Frontier Airlines
Nonstop·round trip
May 15 – May 16
Ontario California aerial with San Gabriel Mountains
Save 31%
$102
$147
San Francisco Golden Gate Bridge
SFOONT
San Francisco to Ontario
Frontier Airlines
Nonstop·round trip
Apr 23 – Apr 24
Ontario California aerial with San Gabriel Mountains
Save 31%
$226
$328
Portland skyline with Mount Hood
PDXONT
Portland to Ontario
Southwest Airlines
Nonstop·round trip
Jun 12 – Jun 15
Ontario California aerial with San Gabriel Mountains
Save 31%
$233
$339
Columbus Ohio skyline
CMHONT
Columbus to Ontario
Frontier Airlines
Nonstop·round trip
Jun 1 – Jun 11
Ontario California aerial with San Gabriel Mountains
Save 30%
$175
$249
Atlanta skyline at sunset
ATLONT
Atlanta to Ontario
Frontier Airlines
Nonstop·round trip
Apr 17 – Apr 19
Ontario California aerial with San Gabriel Mountains
Save 30%
$186
$266
Baltimore Inner Harbor at night
BWIONT
Baltimore to Ontario
Frontier Airlines
Nonstop·round trip
Apr 21 – Apr 22
Ontario California aerial with San Gabriel Mountains
Save 30%
$187
$269
Phoenix skyline with desert mountains
PHXONT
Phoenix to Ontario
American Airlines
Nonstop·round trip
May 22 – May 25
Ontario California aerial with San Gabriel Mountains
$166
$235
Washington DC Capitol building
DCAONT
Washington to Ontario
Frontier Airlines
Nonstop·round trip
Apr 28 – May 20
Ontario California aerial with San Gabriel Mountains
$307
$426
New York City skyline from New Jersey
EWRONT
Newark to Ontario
Frontier Airlines
Nonstop·round trip
May 22 – May 25
Ontario California aerial with San Gabriel Mountains
$331
$460
Washington DC monuments and Capitol
IADONT
Washington to Ontario
American Airlines
Nonstop·round trip
May 5 – May 9
Ontario California aerial with San Gabriel Mountains
$125
$172
Chicago skyline and Lake Michigan
ORDONT
Chicago to Ontario
Frontier Airlines
Nonstop·round trip
Apr 27 – Apr 30
Ontario California aerial with San Gabriel Mountains
$176
$235
Washington DC Capitol building
DCAONT
Washington to Ontario
Frontier Airlines
Nonstop·round trip
Apr 21 – Apr 22
Ontario California aerial with San Gabriel Mountains
$111
$147
San Francisco Golden Gate Bridge
SFOONT
San Francisco to Ontario
Frontier Airlines
Nonstop·round trip
Apr 30 – May 3
Ontario California aerial with San Gabriel Mountains
$326
$423
Dallas Texas skyline
DALONT
DAL to Ontario
Southwest Airlines
Nonstop·round trip
Jul 2 – Jul 7
Ontario California aerial with San Gabriel Mountains
$333
$426
Fort Lauderdale beach aerial
FLLONT
Fort Lauderdale to Ontario
Frontier Airlines
Nonstop·round trip
Apr 16 – Apr 23
Ontario California aerial with San Gabriel Mountains
$136
$172
Chicago skyline and Lake Michigan
ORDONT
Chicago to Ontario
Frontier Airlines
Nonstop·round trip
Apr 25 – Apr 29
Ontario California aerial with San Gabriel Mountains
$213
$268
Chicago skyline
MDWONT
Chicago to Ontario
Southwest Airlines
Nonstop·round trip
May 12 – May 13
Ontario California aerial with San Gabriel Mountains
$123
$154
Houston skyline at sunset
IAHONT
Houston to Ontario
Frontier Airlines
Nonstop·round trip
May 20 – May 23
Ontario California aerial with San Gabriel Mountains
$171
$214
Philadelphia skyline with City Hall
PHLONT
Philadelphia to Ontario
Frontier Airlines
Nonstop·round trip
Apr 21 – Apr 26
Ontario California aerial with San Gabriel Mountains
$171
$214
Philadelphia skyline with City Hall
PHLONT
Philadelphia to Ontario
Frontier Airlines
Nonstop·round trip
May 2 – May 4
Ontario California aerial with San Gabriel Mountains
$271
$336
New York City Manhattan skyline
JFKONT
New York to Ontario
JetBlue Airways
Nonstop·round trip
Jun 12 – Jun 14
Ontario California aerial with San Gabriel Mountains
$338
$423
Dallas Texas skyline
DALONT
DAL to Ontario
Southwest Airlines
Nonstop·round trip
Apr 21 – Apr 25
Ontario California aerial with San Gabriel Mountains
$139
$172
Chicago skyline and Lake Michigan
ORDONT
Chicago to Ontario
Frontier Airlines
Nonstop·round trip
Apr 17 – Apr 19
Ontario California aerial with San Gabriel Mountains
$141
$174
Seattle skyline with Space Needle and Mount Rainier
SEAONT
Seattle to Ontario
Frontier Airlines
Nonstop·round trip
Apr 25 – Apr 26
Ontario California aerial with San Gabriel Mountains
$171
$212
Oakland skyline and Bay Bridge
OAKONT
Oakland to Ontario
Southwest Airlines
Nonstop·round trip
Apr 23 – Apr 28
Ontario California aerial with San Gabriel Mountains
$339
$420
Columbus Ohio skyline
CMHONT
Columbus to Ontario
Southwest Airlines
Nonstop·round trip
May 27 – Jun 1
Ontario California aerial with San Gabriel Mountains
$291
$356
Boston skyline and harbor
BOSONT
Boston to Ontario
Southwest Airlines
Nonstop·round trip
May 6 – May 10
View all 114 deals