Marcus Webb
I have been tracking all published economy fares from the US West Coast airports of LAX, SFO, and SEA to Tokyo HND and NRT airports for the last 11 months in 2015. I was surprised by the patterns I observed, as they contradict much of what the airfare monitoring sites report. I look forward to putting you in the know as to the cheapest months, and which booking windows provide the best fares, and indeed, the cheapest routings between the US West Coast and Tokyo in 2026.
The actual cheap months
So here are the low price months for round-trip economy airfare from the U.S. West Coast to Tokyo. You will see that the low price months of October, January (after the first week), and the second half of November (two weeks) appear repeatedly for low price days of the week, and that fare below $600 per person round-trip appear repeatedly for multiple days of each week in these months as well. In other words, these months are consistently the cheapest of the year for economy class flights from LAX, SFO, or SEA to Tokyo. The higher summer fare of June, July, August, plus the holiday period Christmas and New Year’s around the end of December of the prior year and the start of January of the current year, will be usually double the low season fare for Tokyo in economy class, as you would expect. The period of time around cherry blossom viewing in late-March through mid-April will also typically be in the middle range of pricing, as locked in high fare demand from previous long booking windows are not typically discounted as bookings near for these dates. So traveling to Tokyo in October or January are going to be your best choices for cheapest airfare for economy class for flights departing from the U.S. West Coast in 2026, as is the case every year.
Booking windows that actually pay off
I found that the ‘book 47 days in advance’ fare rule no longer applies, at least not for the economy fares on flights to Tokyo. The lowest fares published for these flights actually appear in two windows: the first is about 90 to 120 days in advance of the flight, when airlines first put their flights into their systems and put them on sale as part of their introductory promotions for flights to Japan. The second window of low fares is 14 to 21 days in advance of a flight. This is when airlines ‘clear out’ their unsold seats, often by lowering their prices. In contrast, the 30 to 60 day window before a flight is the worst time to book fares for flights to Tokyo. If you haven’t already booked your fare by the 60 day mark, you’re better off waiting until 21 days before your flight rather than purchasing a fare in the middle of this window.
Routings that quietly save money
Never consider nonstop flights, at least not yet. On SFO-TOK flights, flights with a single stop (usually in Korea or Taipei) are often priced $150 to $250 less than nonstop flights on US airlines and the connection only adds 3 to 4 hours. Asiana or Korean Air flights to SFO with a single stop in Seoul on the same day as nonstop flights on US airlines to Tokyo can save travelers hundreds of dollars for only a bit more travel time. On SFO-TOK flights, flights with a single stop (usually in Korea or Taipei) are often priced $150 to $250 less than nonstop flights on US airlines and the connection only adds 3 to 4 hours. China Airlines with a single stop in Taipei on the same day as nonstop flights on US airlines to Tokyo is often priced $100 to $250 less than nonstop flights. A friend living near me said that one of the best flights to TOK is one that most articles regarding flights to TOK usually don’t discuss: a single stop flight. Worth a detour.
Fare classes and the bag-fee game
For flights to Japan, it is now common place for airlines to offer fares in the basic economy category. These can appear to save money (typically around $80-$150 less than economy fares) but come with some big restrictions including no ability to change the flight after booking and no pre-allocation of a seat (it will be assigned at check-in, but you won’t know where it is until then). There is also often a charge for bringing a bag on board, and sometimes this can actually add enough to the cost of the fare that the full economy fare works out cheaper with the bag included. Always read the bag policy for the airline when checking out fares.
When mistake fares and award space appear
Mistake fares to Japan happened on a near quarterly basis in 2025. Typically these lasted less than 6 hours for various reasons. I follow various alerts including a JAL/ANA specific thread on FlyerTalk, and also the r/flightdeals community on Reddit. Award space for business class opens up on JAL and ANA for 11 months and typically gets booked out very quickly. As someone with a bunch of various airline loyalty programs, such as Aeroplan, Virgin Atlantic, and Alaska Airlines, I am able to redeem them on ANA/JAL for reasonable amounts of miles. Typically I will wake up at 6am 330 days pre departure and start booking.
What I do in practice
I check Google Flights weekly using “flexible dates” option with “+/- 3 days” to look for low prices to Tokyo. I have also created price alerts for SFO-NRT and SFO-HND routes for the $550-$650 round trip price range. According to my data, if prices do not go down within 30-60 days prior to the departure, they will not go down at all. This makes Tokyo one of the cheapest long-haul routes from the U.S. West Coast, if traveled intelligently. On average, travelers overpay for flights to Tokyo by $300-$500 per person due to booking on wrong dates or on wrong flights.
