Ontario to London (ONT–LHR) — Airlines, Schedules & Connections

ONT Airport Page →
airlines charter/private
On-time Some delays Frequent delays
Connecting Flight Schedule 20 1-stop flights
Nonstop Charter / private 1-Stop 2-Stop Hide separate tickets Hide overnight Hide codeshares
  Flight Airline AC Dep Arr Dur OTP Sched  
✈ Nonstop

No flights match your filters.

No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.

✦ 1-Stop connections via 10 hubs
LAS Las Vegas 12h 14m F9WNY4 → AYBAEI Las Vegas (LAS) to London flights
DEN Denver 12h 17m ACF9G6 → ACAYBA Denver (DEN) to London flights
SLC Salt Lake City 12h 30m AFAMDL → DLSK Salt Lake City (SLC) to London flights
PHX Phoenix 12h 36m AAPDWN → AAAYBA Phoenix (PHX) to London flights
AUS Austin 13h WN → AYBAEI Austin (AUS) to London flights
SEA Seattle 13h 4m ASDLF9 → ASAYBA Seattle (SEA) to London flights
PDX Portland 13h 7m AS → AYBAEI Portland (PDX) to London flights
DFW Dallas-Fort Worth 13h 9m AABAF9 → AAAYBA Dallas-Fort Worth (DFW) to London flights
SFO San Francisco 13h 10m ACCMF9 → ACAYBA San Francisco (SFO) to London flights
JFK New York 13h 42m B6 → AAAYB6 New York (JFK) to London flights
✦ 1-STOP More options, longer trips
✧ 2-STOP Loading... Reach the hardest destinations
Ontario to London
Connecting service available through multiple hubs.
+8h ahead

While no nonstop service exists between ONT and LHR, 1-stop connecting options are available.

Also explore Best way to fly Ontario to London ONT Routes LHR Routes ONT Live Flights LHR Live Flights ONT Delays
All flights from London (LHR) London to Ontario flights
Connections

Connection Landscape

1-stop and 2-stop options for ONT to LHR.
1-STOP
One-Stop Connections
20
Hubs
~12h
Fastest
~31h
Longest
SNN ~12h 3m LAS ~12h 14m DEN ~12h 17m SLC ~12h 30m PHX ~12h 36m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
1,133
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
ONT → LHR
72%
Moderate delays possible. Allow buffer time.
Departing
72%
Return
LHR → ONT
75%
Generally reliable. Most flights run on time.
Arriving
75%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. ONT delays →
Alternatives

Other ways to reach London from Ontario

Nearby airports with service to London Heathrow Airport.
Metric ONT→LHR LAX→LHR SAN→LHR
Distance from ONT – 47 mi 94 mi
Nonstop airlines – 17 4
Weekly flights – 255 36
Departure OTP 72% – –
Los Angeles (LAX) to London flights · San Diego (SAN) to London flights
Airports within 200 miles of ONT with service to London Heathrow Airport.
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
+8h
London is 8 hours ahead of Ontario.
ONT: PDT · LHR: BST

When it's 6:00 PM in Ontario, it's 2:00 AM (next day) in London.
Visa & Entry

US citizens need a UK Electronic Travel Authorisation (ETA) before travel, applied for online. The ETA costs GBP 10 and is valid for multiple entries over 2 years. Stays are permitted for up to 6 months per visit. Passport must be valid for the duration of stay.

Declare goods over GBP 390 in value. UK duty-free allowances apply on goods from outside the UK.

Verify entry requirements with official sources before travel.
Getting from LHR

Heathrow Express runs every 15 minutes to Paddington (15 min, £25). Piccadilly line is slower (50–60 min) but £5.50 with Oyster. National Express coaches serve all terminals from Victoria (60–90 min, £6–10). Black cabs cost £50–90 to central London depending on traffic and time of day.

London Climate

Mild maritime climate. Summers average 18–23°C with long daylight hours. Winters are 2–7°C, rarely below freezing. Rain is frequent year-round but rarely heavy. Pack layers and a waterproof jacket regardless of season. Fog can disrupt flights November through February.

Check current weather forecasts before travel.
Facts

ONT–LHR Quick Facts

Key statistics for the Ontario to London route.
Route details
Time difference+8 hours
Airlines (nonstop)0
1-stop connectionsAvailable
Origin: ONT
Full nameOntario International Airport
IATA / ICAOONT / KONT
TimezoneAmerica/Los_Angeles
Passengers/yr7.0M
Elevation944 ft / 288 m
Destination: LHR
Full nameLondon Heathrow Airport
IATA / ICAOLHR / EGLL
TimezoneEurope/London
Passengers/yr83.9M
Elevation83 ft / 25 m
FAQ

Frequently Asked Questions

Common questions about ONT to LHR flights.
Yes, 1-stop connections are available, ranked by layover time. Common connecting points include Harry Reid, Denver and Salt Lake City.
London is 8 hours ahead of Ontario.
Nearby alternatives include LAX and SAN. See the Alternatives section for a full comparison.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Connecting Options and Alternatives

1-stop connecting options are also available, commonly via Harry Reid, Denver and Salt Lake City. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Los Angeles (LAX) and San Diego (SAN).