- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 35% on select hotels after you book a flight*
Plan, book, fly with confidence
Cheap round-trip flights to Costa Mesa
Prices were available within the past 7 days and start at HK$1,592 for one-way flights and HK$3,910 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Saturday, 17 Aug - Saturday, 24 Aug
NAS
Lynden Pindling Intl.
ONT
Los Angeles - Ontario Intl.
HK$3,910 Return, found 1 day ago
HK$3,910
Return
found 1 day ago
Tuesday, 25 Jun - Friday, 28 Jun
EWR
Liberty Intl.
ONT
Los Angeles - Ontario Intl.
HK$4,556 Return, found 22 hours ago
HK$4,556
Return
found 22 hours ago
Sunday, 12 Jan - Saturday, 18 Jan
NAS
Lynden Pindling Intl.
ONT
Los Angeles - Ontario Intl.
HK$5,032 Return, found 19 hours ago
HK$5,032
Return
found 19 hours ago
Tuesday, 25 Jun - Wednesday, 26 Jun
EWR
Liberty Intl.
SNA
John Wayne
HK$5,334 Return, found 22 hours ago
HK$5,334
Return
found 22 hours ago
Thursday, 1 Aug - Wednesday, 14 Aug
LIM
Jorge Chavez Intl.
ONT
Los Angeles - Ontario Intl.
HK$5,585 Return, found 14 hours ago
HK$5,585
Return
found 14 hours ago
Frequently asked questions
Destination airport | Los Angeles - Ontario Intl. |
Destination airport IATA code | ONT |
Destination city name | Ontario |
Return price | HK$4,556 |
More to explore for Costa Mesa
Heading to Costa Mesa? Explore Costa Mesa with Expedia's Travel Guides to find the best hotels, holiday packages, car hire deals and more!
Trending flights to Costa Mesa
Prices were available within the past 7 days and start at HK$1,592 for one-way flights and HK$3,910 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Friday, 27 Sep - Friday, 11 Oct
HKG
Hong Kong Intl.
ONT
Los Angeles - Ontario Intl.
HK$7,921 Return, found 4 days ago
HK$7,921
Return
found 4 days ago
- Top Flights Destinations
- From Other Airports to Costa Mesa
- Flights to Cities Near Costa Mesa
- Top Costa Mesa Hotels
- Other Carriers
Top Flight Destinations
Top Flight Destinations In World
- Flights to Japan
- Flights to Taiwan
- Flights to Thailand
- Flights to Philippines
- Flights to Indonesia
- Flights to United Kingdom
- Flights to Australia
- Flights to United States of America
- Flights to South Korea
- Flights to Canada
- Flights to Vietnam
- Flights to Malaysia
- Flights to China
- Flights to New Zealand
- Flights to Italy
- Flights to Switzerland
- Flights to India
- Flights to France
- Flights to Poland
- Flights to Türkiye
From Other Airports to Costa Mesa
Flights to Cities Near Costa Mesa
*Available to Expedia members.