The general mode comparison doesn't cover the family variables
Choosing between AREX, limousine bus, and taxi from Incheon to Seoul usually comes down to speed, cost, and luggage for most travelers. With young kids and a stroller, the more important variables shift toward how many transfers you'll make, whether there are stairs involved, and whether you can keep the stroller assembled the whole way. This guide focuses specifically on that family-and-gear layer rather than repeating the general transfer comparison.
AREX is fast, but check the transfer before you commit
AREX's express train reaches Seoul Station from Incheon Airport in roughly 43-51 minutes depending on your terminal, with the all-stop train taking about 59-66 minutes. Major transit hubs typically have elevators, but this guide cannot confirm step-free routing for every specific station transfer on your journey, including whichever station you'd change at if your final destination isn't Seoul Station itself.
Limousine bus: fewer transfers, but you must book ahead
The limousine bus avoids subway transfers and stairs entirely, since you board once at the airport and get off near your destination. That convenience comes with a catch for families arriving without a plan: buses require an advance ticket, and payment by cash or transportation card is not accepted at boarding. If you're managing kids and bags at the same time, working out this purchase before or immediately upon arrival — rather than trying to figure it out at the curb — avoids added stress.
Taxi: the most gear-friendly option, at an unconfirmed fare
Incheon Airport offers four taxi types: standard, premium deluxe, jumbo (large/van), and international taxi, which requires an advance reservation and offers foreign-language service. For a family with a stroller and a full set of luggage, the jumbo/large option is the one built for extra gear, and a taxi in general means no transfers and no stairs between the airport and your accommodation's door. The exact fare for any of these taxi types wasn't confirmed in this guide's research, so budget for it as an unknown rather than assuming a specific price, and check the metered rate or ask at the taxi stand before you commit.
What usually goes wrong
Families sometimes assume a subway or express train transfer will be quick, only to find themselves navigating stairs or a longer walk between platforms with a folded-but-loaded stroller and no working hands free. If avoiding that scenario matters more to you than saving time or money, the limousine bus or a taxi both remove that specific risk, at the cost of either advance planning (bus) or an unconfirmed fare (taxi).