Flights Ciudad de México to San Juan (MEX-SJU): airlines

Flights Ciudad de México → San Juan: airlines, fares, timing

The MEX–SJU route appears in our catalogue with 5 weekly departures (~0.7 per day) across 1 airline, 3.8 h of block time and 3,475 km great-circle between Ciudad de México and San Juan. Demand score: 6/10, classified as the Caribbean leisure corridor.

Mexico City to San Juan links the Mexican capital with the capital of Puerto Rico, with around 5 flights a week. The route carries tourists, passengers visiting relatives and those connecting within the Caribbean. Block time is about three and three-quarter hours.

At 5 weekly departures this is not a daily route. On a route like this a cancellation can mean waiting days or accepting a reroute through another airport, and the departure dates drive the price far more than the choice of carrier.

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

A single catalogued airline operates MEX–SJU: Aeromexico, with 5 weekly departures. With no second operator there is no carrier-to-carrier price comparison on this pair, so the only real saving lever is the departure date, not the choice of airline. Checked allowance: 25 kg.

Aeroméxico flies MEX-SJU full-service, with checked baggage and meals included, direct to San Juan. As a single-carrier route with few weekly flights, the schedule is the main variable to consider — choosing dates that line up with the available departure.

The allowance belongs to the fare, not to the passenger. The kilos listed are those of the published base fare. ‘Basic’, ‘light’ and ‘zero’ families on several carriers exclude the checked bag, seat selection and sometimes date changes, even though the flight and the aircraft are identical. The carrier’s AM Paisano (1ra maleta gratis 25kg internacional) programme attaches to specific fare families: buy the cheapest bucket and the benefit does not travel with you. Always compare with the bag already added: on short sectors the ranking of operators usually flips once it is in.

MXN fares — what to expect

There is no live cached fare for MEX-SJU, but 5 historical readings exist between 2026-W20 and 2026-W27: the observed floor in that window was $6,500 MXN and the ceiling $8,569 MXN. Only 34 of 109 corridors returned a price on the last pass.

With one carrier and few frequencies, MEX-SJU fares respond quickly to demand. Winter, Holy Week and the summer are the peaks, when booking two to three months ahead is sensible. Off-season, five to seven weeks usually secures a reasonable fare in MXN.

Get live fares on Aviasales →

Buying window: a general market rule of thumb. At demand 6/10 and 5 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-SJU: 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 San Juan

San Juan (SJU) appears in 2 routes in our catalogue from 2 Mexican airports, totalling 12 weekly departures. The lowest fare detected into SJU departs CUN at $7,195 MXN. Aeropuerto Internacional Luis Muñoz Marín (SJU, ICAO TJSJ) lies 3,475 km from Ciudad de México and runs on America/Puerto_Rico.

San Juan is the capital of Puerto Rico, a coastal city with a walled historic core, Old San Juan, listed as a World Heritage Site. It pairs colonial architecture, beaches and Caribbean urban life. From Mexico City it is a tourist destination and a connecting point within the Caribbean.

Destination record. San Juan — Puerto Rico (US territory, B1/B2 visa required). Old San Juan, Condado, El Yunque rainforest.

Currency and paperwork at destination. Spending in San Juan runs in USD, while the fare is compared in pesos. For a Mexican passport our record lists: B1/B2 required (territorio US). 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-SJU fare has moved

Across 5 weekly readings between 2026-W20 and 2026-W27 of 2026, the detected minimum for MEX-SJU moved between $6,500 MXN and $8,569 MXN, a 32% range. The cheapest reading fell in week 2026-W20. The latest reading sits 6% below the one before it.

Method and limits of this series. These are 5 observations, one per collector pass, taken between 2026-W20 and 2026-W27 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 $6,500 MXN you are at the low end of what was observed in this window and waiting rarely pays. If it is above $8,569 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–SJU route

25% of the ticket at minimum for a delay over 4 h attributable to the airline: that is what Art. 47 Bis of the Ley de Aviación Civil sets on the MEX → SJU leg, which departs Mexico. On the return from Puerto Rico the departure country’s regulator governs.

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.

Connections, layovers and the checked bag

With one catalogued airline and 5 weekly departures, MEX-SJU leaves little slack: if the flight goes, the realistic alternative is a connection via another airport. Before accepting one, check whether the itinerary is on a single ticket or on two.

The cheap connection that loses the checked bag. Two separate tickets are not one itinerary: there is no interline agreement, the bag is not checked through to the final destination, and if the first flight lands late the second airline owes you nothing — it sold a different flight. The apparent saving evaporates the moment you buy a same-day replacement. On a single ticket, rebooking and the bag transfer are the carrier’s problem, not yours.

‘Direct’ is not ‘nonstop’. In booking language a direct flight is one that keeps the same flight number end to end — and it may land at an intermediate city, offload passengers and take off again. Nonstop is a different claim. When the search engine shows a total time well above the catalogued block time for the pair, there is an intermediate stop in there, whatever the ‘direct’ filter says.

Documents to sort out before buying

1 requirement is what our destination record lists for San Juan (SJU) on a Mexican passport: B1/B2 required (territorio US). That is a starting point, not a ruling on your case: requirements change with the purpose of travel, the length of stay and each person’s immigration history.

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.

Passports expire sooner than you think. Many countries require remaining validity on entry rather than on exit, and the airline can deny boarding in Ciudad de México if you fall short — with no refund, because the denial is documentary rather than operational. Check the expiry date against your return date, not your outbound one, and do it before paying for a non-refundable fare.

Minors and mismatched surnames. When a minor travels with one parent or with third parties, the airline and immigration may ask for the other parent’s authorisation, and the name on the ticket must match the passport letter for letter. A second surname dropped at purchase counts as a name change and many fares charge it as a reissue. Check it on the passenger screen before confirming.

FAQ

The 5 questions on this record are answered from catalogue figures for MEX-SJU: routes and weekly frequencies, minimum fares observed by the collector, checked-baggage allowances and the rights regime that applies on each leg. No answer adds data that is not in those sources.

Which airlines fly Ciudad de México to San Juan? Direct MEX-SJU flights are operated by Aeromexico. Compare baggage, fares and schedules in the carrier table above.

How long is the MEX-SJU flight and how often does it run? Block time is about 3.8 hours. The MEX-SJU route runs roughly 5 flights per week across all carriers.

How far ahead should I book MEX-SJU 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-SJU? 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.

Do Mexican passport holders need a visa for Puerto Rico? B1/B2 required (territorio US). Check the latest requirements with the consulate before buying your ticket.

Related articles

• Flights from Ciudad de México
• Flights to San Juan
• Baggage comparator

Published by FlightsMX Editorial Team. Last verified: May 2026. Fares are reference brackets — verify with the airline before booking.