The Los Angeles–Bangkok itinerary listed here uses UA820 via Hong Kong, while the San Francisco departure connects from UA877 to UA820 in Hong Kong. Choose the check-in instructions for your US departure airport and confirm your travel date.
United publishes daily Los Angeles–Bangkok service via Hong Kong: UA820 toward Bangkok and UA821 toward Los Angeles. Each journey keeps the same flight number through the stop in Hong Kong. It is not a nonstop flight. Check your ticket for any aircraft-change or transfer instructions.
From San Francisco, take UA877 to Hong Kong and change to UA820 for Bangkok. For the return, take UA821 to Hong Kong and change to United-operated UA878 for San Francisco. United also publishes these connecting services as daily.
For departures on December 18, 2026, the booking search showed a 2-hour-35-minute connection toward Bangkok and a 1-hour-45-minute connection toward San Francisco. These are separate observations dated at each departure airport. Departure times, connection times and aircraft can change; use your own booking for the day you travel.
LAX Airport Police handles items lost in public airport areas. For a lost suitcase or an item left on an aircraft, the airport directs passengers to their airline. An airport lost-property inquiry is not an airline checked-baggage report.
Terminal 7 · United check-in
Go to Terminal 7 for United check-in, as shown on LAX’s airline location map dated July 1, 2026. The terminal number is not a counter number. Check your booking and United’s instructions for the counter assignment and check-in deadline.
Checked on: 2026-10-19
International Terminal G · Level 3 · Aisles 1–2
For a United international departure from San Francisco, check in on the International Terminal’s Departures Level (Level 3). Business and Premium passengers use Aisle 1; Economy passengers use Aisle 2. Aisles are check-in rows, not boarding gate numbers. This is separate from United’s domestic Terminal 2 and Terminal 3 listings. Ask United for the counter opening time and your flight’s check-in deadline; security checkpoint hours are not check-in hours.
Checked on: 2026-10-19
SFO lists this number as United’s Baggage Service. It is a baggage support channel, not a verified direct phone for a check-in counter or a particular arrivals desk. If your checked bag is missing or damaged, contact the operating airline’s arrivals baggage team and keep the report number.
Checked on: 2026-10-19
The LAX airline directory lists this United contact. Use it for airline assistance; it is not a verified direct line to the airport check-in desk. For missing checked baggage, ask the operating airline’s arrivals baggage team for the appropriate report.
Checked on: 2026-10-19
The SFO United international entry labels this number General Telephone. It is an airline contact, not a dedicated check-in desk or departure gate phone. Use the baggage service number for baggage support.
Checked on: 2026-10-19
The UA820 and UA821 itineraries listed here stop in Hong Kong under the same flight number. Confirm any aircraft-change or transfer instructions on your ticket.
LAX’s airline location map, dated July 1, 2026, directs United passengers to Terminal 7 for check-in. Confirm the counter and check-in deadline for your flight with United.
No. The airport directory lists +1 800-241-6522 as the airline contact. It is a general airline channel, not a verified direct telephone for the Terminal 7 check-in desk.
For this United itinerary via Hong Kong, use international check-in in the International Terminal, Level 3: Aisle 1 for Business and Premium passengers and Aisle 2 for Economy. United’s domestic Terminal 2 and Terminal 3 listings are separate. Confirm your flight’s counter and deadline before traveling.
No. The listed December 18, 2026 return uses UA821 from Bangkok to Hong Kong and UA878 from Hong Kong to San Francisco. Change flights in Hong Kong and check the operating airline and connection details on your ticket.
UA878 is operated by United Airlines. For the listed Bangkok-San Francisco return, you change from UA821 to UA878 in Hong Kong. Check the operating airline on your ticket again if your booking changes.
Verified departure dates: 2026-12-18
Verified departure dates: 2026-12-18
Verified departure dates: 2026-12-18
Verified departure dates: 2026-12-18
Source check date:
