Ciudad de México to Seattle

Flights Ciudad de México → Seattle: airlines, fares, timing

The MEX–SEA route appears in our catalogue with 12 weekly departures (~1.7 per day) across 3 airlines, 4.8 h of block time and 3,757 km great-circle between Ciudad de México and Seattle.

Mexico City to Seattle connects the capital with the US Pacific Northwest, with around 12 flights a week. Seattle is a technology centre, and the route carries business travellers alongside families visiting relatives and tourists. Block time is close to five hours, the longest of the US corridors out of the capital.

At ~1.7 departures a day there is daily service but little cushion: if the flight cancels, the same airline’s next option is usually the following day. Leave slack on any onward connection and avoid buying the last departure of the day when something is booked after it.

How to read these figures. Weekly departures are an aggregate estimate from the published schedules of every catalogued carrier on the pair, one-way; the flight time is block time — gate to gate, taxi included — not airborne time. Neither is a schedule guarantee: carriers cut frequencies in low season without notice.

Airlines operating this route

3 airlines operate MEX–SEA: Aeromexico, Alaska Airlines, Volaris. 2 are full-service and 1 low-cost; included checked allowance ranges from 0 to 25 kg depending on the operator. Between them they run 12 weekly departures over 4.8 h of block time; alliances present: SkyTeam, oneworld.

Three carriers fly MEX-SEA: Aeroméxico and Alaska Airlines operate full-service with baggage included, while Volaris flies it low-cost. Alaska has its main hub in Seattle, widening onward connections across the Northwest and to Alaska. All three fly direct.

Full-service and low-cost are not selling the same thing. The pair’s 2 full-service airlines sell a price that already includes a bag and usually paid changes; the 1 low-cost ones sell the seat and charge for everything else. At comparable departure times the decision comes down to how much luggage you really carry and whether you need date flexibility — not to the first figure the search engine shows.

MXN fares — what to expect

In the 2026-W29 reading, the minimum fare for MEX-SEA was $9,347 MXN one-way; the most recent one, with the date it was found, is shown in this page’s fare observation.

MEX-SEA fares climb in December, Holy Week and the summer. For those dates, booking two to three months ahead is sensible. Off-season, five to seven weeks usually secures a reasonable fare in MXN, with the low-cost option cheapest for travellers packing light.

Get live fares on Aviasales →

Buying window: a general market rule of thumb. At 12 weekly departures the usual reference is 4 to 8 weeks ahead on ordinary dates and 8 to 12 weeks for December, Holy Week and summer. That is a general Mexican-market rule of thumb, not a measurement of MEX-SEA: our series records observed prices, not the lead time at which each ticket was bought. What the data does support is that the lower the frequency, the sooner cheap inventory runs out.

About Seattle

Seattle (SEA) appears in 2 routes in our catalogue from 2 Mexican airports, totalling 19 weekly departures. Seattle-Tacoma International Airport (SEA, ICAO KSEA) lies 3,757 km from Ciudad de México and runs on America/Los_Angeles.

Seattle is the largest city in Washington State, set between the ocean and the mountains, known for its technology industry, its coffee and its cultural life. For Mexican travellers it is mostly a business and family-visit destination, with connections across the US Northwest.

Destination record. Seattle — Pacific Northwest paisano corridor. Mexican community in Burien, Auburn, South Park.

Currency and paperwork at destination. Spending in Seattle runs in USD, while the fare is compared in pesos. For a Mexican passport our record lists: B1/B2 required. That field is a starting reference; the real requirement depends on the purpose of travel and is set by the destination’s immigration authority, not the airline.

How the MEX-SEA fare has moved

Across 5 weekly readings between 2026-W20 and 2026-W29 of 2026, the detected minimum for MEX-SEA moved between $4,167 MXN and $9,347 MXN, a 124% range. The cheapest reading fell in week 2026-W25. The 2026-W29 reading sits 57% above the 2026-W27 one.

Method and limits of this series. These are 5 observations, one per collector pass, taken between 2026-W20 and 2026-W29 on the same pair and in the same currency (MXN). It is not a price index: it does not control for departure date, booking lead time or fare class, and a missing week means the query returned nothing, not that no flights existed. At that N it is good for placing today’s quote inside a known range, and for nothing else.

How to use it when buying. If today’s quote sits near $4,167 MXN you are at the low end of what was observed in this window and waiting rarely pays. If it is above $9,347 MXN, or your dates fall in December, Holy Week or summer, the figure you see is probably seasonal rather than structural. In no case extrapolate the series forward: six readings do not predict the seventh.

Passenger rights on the MEX–SEA route

25% of the ticket price is the minimum Art. 47 Bis of the Ley de Aviación Civil requires on the MEX → SEA leg, which departs Mexico, for a delay over 4 h attributable to the airline. On the return from the United States there is no federal delay compensation.

What does apply on departure from Mexico. Mexico’s Ley de Aviación Civil (Art. 47 Bis), enforced by AFAC and PROFECO, covers flights taking off from Mexican territory regardless of the airline’s nationality: a delay over 4 hours attributable to the carrier entitles you to at least 25% of the ticket price, and from the first hour the airline owes assistance that escalates with duration. Keep the boarding pass and the purchase receipt — a claim stands on those two documents.

What US DOT does not cover. The United States has no federal delay compensation: the Department of Transportation regulates refunds — your money back when the airline cancels or significantly changes the flight and you decline the alternative — but it does not require a payout for the hours you lost, the way EU261 does. The single federal exception is involuntary denied boarding from oversales, priced under 14 CFR Part 250; that is a different mechanism from delay and is not triggered by a late departure.

Documents to sort out before buying

Checked 2026-10-23 against the official source: with a Mexican passport, Estados Unidos — Visa B1/B2 obligatoria. Cost: $185 USD no reembolsable (tarifa MRV). Maximum stay: La fija el oficial de CBP al ingresar. Confirm the current amount before paying. Buying the ticket before the document exists is the expensive mistake on this route.

Check the current amount before paying. The consular fee and stay limit above were checked against the official source on 2026-10-23. Consulates revise those amounts without notice and publish no change calendar, so confirm the current figure at the official source on the day you pay. A receipt issued at the old rate is neither refunded nor credited — it is simply paid again.

The right order: document first, ticket second. A cheap fare does not survive a pending immigration formality. The airline will not refund a non-refundable ticket because your visa was denied or delayed, and the change fee usually exceeds the saving you were chasing. Buy once the document is issued, or buy a changeable fare and accept that the premium is the price of the risk.

FAQ

Which airlines fly Ciudad de México to Seattle? Direct MEX-SEA flights are operated by Aeromexico, Alaska Airlines, Volaris. Compare baggage, fares and schedules in the carrier table above.

How long is the MEX-SEA flight and how often does it run? Block time is about 4.8 hours. The MEX-SEA route runs roughly 12 flights per week across all carriers.

How far ahead should I book MEX-SEA for the best fare? As a general Mexican-market rule of thumb — not a measurement of this route — booking runs 4-8 weeks ahead for regular dates and 8-12 weeks for peak season (Holy Week, Christmas, paisano summer). See the month-by-month fare heatmap above.

What is the checked baggage allowance on MEX-SEA? It varies by carrier and fare class — full-service carriers on this route usually include 23-25 kg, while low-cost carriers sell it separately. Confirm the current policy on the airline’s site before booking. Paisano travelers should check each carrier’s additional-baggage allowance.

Do Mexican passport holders need a visa for USA? B1/B2 required. Check the latest requirements with the consulate before buying your ticket.

Related articles

• Flights from Ciudad de México
• Flights to Seattle
• Baggage comparator

Published by FlightsMX. Fares are reference brackets — verify with the airline before booking.