Find Cheap Flights from London to Ontario (LON - ONT)

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London to Ontario Flight Information

Flights Arrive in Ontario
Flights Depart from London
Flight Price $805
Distance 5420 miles
Airlines British Airways

Top Tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $657 or less.

FAQs for Booking London to Ontario Flights

How long does a flight from London to Ontario take?
An average nonstop flight takes 18h 54m, covering a distance of 5420 miles.
Which airlines provide the cheapest flights from London to Ontario?
In the past 3 days, the cheapest round-trip tickets were found on British Airways ($805) and Multiple Airlines ($916)
Do I need a passport to fly between London and Ontario?
Yes.
What’s the cheapest day of the week to fly London to Ontario?
For London to Ontario, Monday is the cheapest day to fly on average and Friday is the most expensive. Flying from Ontario back to London, the best deals are generally found on Tuesday, with Friday being the most expensive.

Book cheap flights from London to Ontario (round-trip)

Airports
Origin
London
$805
only
$805
$916
only
$916
Destination
Ontario
$805
only
$805
Mon, May 7
LHR
ONT
25h 20m
Thu, May 17
ONT
LHR
18h 40m
Trip: 11 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
LHR
ORD
Excellent 8.3

Since I'm in a wheelchair the folks were ready at the gate to assist me with the aisle chair. Once on board, the crew informed me of an aisle chair in the plane so during the flight I can use the bathroom. This was my first time using the plane washroom. Food was great.

I can't get same helpful crew for Intl flights.

CDG
LHR
Excellent 8.3

Crew professionalism and on-schedule.

Luggage drop off took a while to complete.

MIA
LHR
Mediocre 2.0

I did nit get on time to the flight to Tel Aviv

DEN
LHR
Okay 5.3

Texting about lost bag, fast information

There not enough time for right connections if always delayed, bags are not at the destinatiion, no drinking water without ovepriced purchase on the plane from London to Prague,

LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

Mon, May 7
LGW
ONT
27h 36m
Thu, May 17
ONT
LGW
17h 00m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Sep 11
LHR
ONT
21h 28m
Mon, Sep 17
ONT
LHR
20h 15m
Trip: 7 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
LHR
FRA
Okay 5.6

We nearly missed the plane due to how closely our flights were scheduled. Then our luggage did not arrive with us our plane. We didnt have time to stop for a snack or water so a small something would have been helpful.

LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

ATL
LHR
Excellent 8.0

Everything was for sale

LHR
LAX
Excellent 8.3

Lots of video entertainment options and economy plus was very comfortable.

A380 takes a long time to load everyone onto plane and get everyone off the plane as well.

CDG
LHR
Excellent 8.3

Crew professionalism and on-schedule.

Luggage drop off took a while to complete.

Wed, Sep 19
LHR
ONT
19h 25m
Fri, Sep 28
ONT
LHR
15h 35m
Trip: 10 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
LHR
ORD
Excellent 8.3

Since I'm in a wheelchair the folks were ready at the gate to assist me with the aisle chair. Once on board, the crew informed me of an aisle chair in the plane so during the flight I can use the bathroom. This was my first time using the plane washroom. Food was great.

I can't get same helpful crew for Intl flights.

LHR
LAX
Excellent 8.3

Lots of video entertainment options and economy plus was very comfortable.

A380 takes a long time to load everyone onto plane and get everyone off the plane as well.

LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

DEN
LHR
Okay 5.3

Texting about lost bag, fast information

There not enough time for right connections if always delayed, bags are not at the destinatiion, no drinking water without ovepriced purchase on the plane from London to Prague,

MIA
LHR
Mediocre 2.0

I did nit get on time to the flight to Tel Aviv

Sat, Oct 27
LHR
ONT
18h 54m
Sat, Nov 3
ONT
LHR
18h 25m
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
LHR
ORD
Excellent 8.3

Since I'm in a wheelchair the folks were ready at the gate to assist me with the aisle chair. Once on board, the crew informed me of an aisle chair in the plane so during the flight I can use the bathroom. This was my first time using the plane washroom. Food was great.

I can't get same helpful crew for Intl flights.

DEN
LHR
Okay 5.3

Texting about lost bag, fast information

There not enough time for right connections if always delayed, bags are not at the destinatiion, no drinking water without ovepriced purchase on the plane from London to Prague,

DEN
LHR
Excellent 10.0

Excellent food and service.

ATL
LHR
Excellent 8.0

Everything was for sale

LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

Mon, Jun 25
LHR
ONT
21h 26m
Mon, Jul 2
ONT
LHR
16h 45m
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
DEN
LHR
Okay 5.3

Texting about lost bag, fast information

There not enough time for right connections if always delayed, bags are not at the destinatiion, no drinking water without ovepriced purchase on the plane from London to Prague,

LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

LHR
EWR
Excellent 10.0

all of the same reasons as noted above

FCO
LHR
Good 6.3

Bob, the flight attendant, was funny and attentive.

Wheelchair tag came off and lady at gate was not helpful.

LHR
ORD
Excellent 8.3

Since I'm in a wheelchair the folks were ready at the gate to assist me with the aisle chair. Once on board, the crew informed me of an aisle chair in the plane so during the flight I can use the bathroom. This was my first time using the plane washroom. Food was great.

I can't get same helpful crew for Intl flights.

Sat, Sep 1
LGW
ONT
32h 38m
Sun, Sep 9
ONT
LGW
24h 40m
$1004
Trip: 9 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
DEN
LHR
Excellent 10.0

Excellent food and service.

LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

CDG
LHR
Excellent 8.3

Crew professionalism and on-schedule.

Luggage drop off took a while to complete.

AMS
LHR
Excellent 10.0

staff very considerate, decent food with several snacks in-between, would fly them again readily

ATL
LHR
Excellent 8.0

Everything was for sale

Mon, Jul 2
LHR
ONT
20h 13m
Mon, Jul 9
ONT
LHR
15h 39m
$1036
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
LHR
EWR
Excellent 10.0

all of the same reasons as noted above

LHR
LAX
Excellent 8.3

Lots of video entertainment options and economy plus was very comfortable.

A380 takes a long time to load everyone onto plane and get everyone off the plane as well.

DEN
LHR
Okay 5.3

Texting about lost bag, fast information

There not enough time for right connections if always delayed, bags are not at the destinatiion, no drinking water without ovepriced purchase on the plane from London to Prague,

FCO
LHR
Good 6.3

Bob, the flight attendant, was funny and attentive.

Wheelchair tag came off and lady at gate was not helpful.

CDG
LHR
Excellent 8.3

Crew professionalism and on-schedule.

Luggage drop off took a while to complete.

Fri, Aug 24
LHR
ONT
19h 25m
Sun, Sep 9
ONT
LHR
16h 45m
$1072
Trip: 17 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

DEN
LHR
Excellent 10.0

Excellent food and service.

FCO
LHR
Good 6.3

Bob, the flight attendant, was funny and attentive.

Wheelchair tag came off and lady at gate was not helpful.

LHR
LAX
Excellent 8.3

Lots of video entertainment options and economy plus was very comfortable.

A380 takes a long time to load everyone onto plane and get everyone off the plane as well.

AMS
LHR
Excellent 10.0

staff very considerate, decent food with several snacks in-between, would fly them again readily

Thu, Jul 12
LHR
ONT
21h 26m
Wed, Jul 18
ONT
LHR
14h 39m
$1226
Trip: 7 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
DEN
LHR
Excellent 10.0

Excellent food and service.

LHR
ORD
Excellent 8.3

Since I'm in a wheelchair the folks were ready at the gate to assist me with the aisle chair. Once on board, the crew informed me of an aisle chair in the plane so during the flight I can use the bathroom. This was my first time using the plane washroom. Food was great.

I can't get same helpful crew for Intl flights.

LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

LHR
EWR
Excellent 10.0

all of the same reasons as noted above

CDG
LHR
Excellent 8.3

Crew professionalism and on-schedule.

Luggage drop off took a while to complete.

Fri, Apr 27
LHR
ONT
20h 02m
Fri, May 4
ONT
LHR
15h 37m
$1383
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 16438 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
CDG
LHR
Excellent 8.3

Crew professionalism and on-schedule.

Luggage drop off took a while to complete.

LHR
TLV
Mediocre 2.0

British airways new I'l be late , they could send someone to pick me up from the security point, so I could have been on time.

DEN
LHR
Excellent 10.0

Excellent food and service.

ATL
LHR
Excellent 8.0

Everything was for sale

MIA
LHR
Mediocre 2.0

I did nit get on time to the flight to Tel Aviv

*
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