Great Circle Distance between Heathrow and Tan Son Nhat International Airport is 6,349 miles, with a flight time of approx 13 hrs. Ho Chi Minh's IATA airport code is SGN.
Show Tan Son Nhat International Airport on map.
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Climate:
In the southern part of the country and on the southern islands the climate is hot all year round, with the rainy period in the summer. Between November and mid-February, the temperatures are around 31°C. In mid-February, the temperatures starts to rise and reach the highest level of the year between March and May, averaging 35°C but with peaks of 40°C, before the arrival of the monsoon in the summer. The rains during the May to mid-November monsoon season are abundant with the maximum rainfall in September. The best time to visit southern Viet Nam is from December to mid-February. March and April are still dry months, but they can be uncomfortably hot. However, sea breezes blow along the coasts and on the islands. Viet Nam is located in the path of typhoons, the tropical cyclones of the western Pacific, which affect the country from the east. In the south, typhoons generally occur from mid October to late December, with the most in early November. In January, and again from March to mid-May, some tropical depressions can occasionally form, generally off the central-southern coast, but they almost always dissipate over the sea before reaching the coast. However, they can cause abnormal waves.
BA Tier Points Earned
| Route 1 | LHR‑DOH
(QR)  | DOH‑SGN
(QR) |
|
| TOTAL
(SGL) | TOTAL
(RTN) |
|---|
| Economy | 20 | 20 | | | 40 | 80 |
| WTP | 20 | 20 | | | 40 | 80 |
| Business | 140 | 140 | | | 280 | 560 |
| First | 210 | 210 | | | 420 | 840 |
| |
| Route 2 | LHR‑HEL
(AY)  | HEL‑DOH
(AY) | DOH‑SGN
(QR) |
| TOTAL
(SGL) | TOTAL
(RTN) |
|---|
| Economy | 10 | 20 | 20 | | 50 | 100 |
| WTP | 10 | 90 | 20 | | 120 | 240 |
| Business | 80 | 140 | 140 | | 360 | 720 |
| First | 80 | 140 | 210 | | 430 | 860 |
| |
| Route 3 | LHR‑HEL
(BA)  | HEL‑DOH
(AY) | DOH‑SGN
(QR) |
| TOTAL
(SGL) | TOTAL
(RTN) |
|---|
| Economy | 10 | 20 | 20 | | 50 | 100 |
| WTP | 10 | 90 | 20 | | 120 | 240 |
| Business | 80 | 140 | 140 | | 360 | 720 |
| First | 80 | 140 | 210 | | 430 | 860 |
| |
| Route 4 | LHR‑MAN
(BA) | MAN‑HEL
(AY) | HEL‑DOH
(AY) | DOH‑SGN
(QR) | TOTAL
(SGL) | TOTAL
(RTN) |
|---|
| Economy | 5 | 10 | 20 | 20 | 55 | 110 |
| WTP | 5 | 10 | 90 | 20 | 105 | 210 |
| Business | 40 | 80 | 140 | 140 | 400 | 800 |
| First | 40 | 80 | 140 | 210 | 470 | 940 |
| |
Economy Tier Points shown are based on fully flexible fares. 'Low' Economy earns 50% of the shown amount. 'Lowest' Economy fares earn 25% of shown amount.
When journey is booked in World Traveler Plus or First and those cabins don't exist on particular legs, the next cabin down will be used on those legs for points collection.
When booking with BA, tier points can be earned on the following 
Oneworld Alliance ® airlines:
Alaska Airlines, 
American Airlines, British Airways, 
Cathay Pacific, 
Fiji Airways, Finnair, 
Iberia, 
Japan Airlines, 
Malaysia Airlines, 
Qantas, Qatar Airways, 
Royal Air Maroc, 
Royal Jordanian, 
SriLankan Airlines
Avios Required (per leg) for BA Redemption Flight from London to Ho Chi Minh City, (Zone 7, 5,501-6,500 miles)
| Cabin | Off Peak Travel | Peak Travel |
| Economy | 19,500 | 30,000 |
| World Traveller Plus | 39,000 | 60,000 |
| Club | 75,000 | 90,000 |
| First | 102,000 | 120,000 |
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