Cheap Flights from Hanoi to San Francisco from $424

Frequently Asked Questions

• What are the cheapest flights from Hanoi to San Francisco (HAN-SFO)?

  Based on Trip.com data, VietJet Air offers one-way fares as low as $424 on Cheapest nonstop routes (e.g. HAN to SFO on Sun, May 31), while Asiana Airlines offers Cheapest nonstop round-trips from $679 departing on Sat, May 9 and returning on Sat, May 16.

• Which airlines offer direct flights from Hanoi to San Francisco?

  At the moment, you can catch a nonstop flight from Hanoi to San Francisco with the following airlines, including: Shenzhen Airlines Vietnam Airlines Cathay Pacific Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• When is the best time to book flights from Hanoi to San Francisco?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Hanoi to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Hanoi to San Francisco?

  To find best deals on flights from Hanoi to San Francisco, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sun, May 31, with one-way flights priced at just $424.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is VietJet Air.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Hanoi (HAN) to San Francisco (SFO) the cheapest?

  The cheapest months to fly from Hanoi to San Francisco is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Hanoi to San Francisco on?

  After crunching the numbers on our April flight calendar, it's currently cheapest to fly from Hanoi to San Francisco on April 23, 2026 with VietJet Air, with prices starting at $404.

• Which airports can I fly to for San Francisco from Hanoi?

  You can land at any one of the following hubs in San Francisco, with Noi Bai International Airport to San Francisco International Airport (HAN-SFO) is by far the most common option on this route: San Francisco International Airport (SFO).

• Is there any time difference between Hanoi and San Francisco?

  The time difference between San Francisco and Hanoi is 15h.

• How do I change or cancel my ticket from Hanoi to San Francisco?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.