What is hub and spoke in air travel?

How does the hub-and-spoke model work?

In a hub-and-spoke network, one airport acts as the collection point for a whole region. Flights from the spokes arrive at the hub, passengers change to another flight, and the outbound wave carries them to their final city. A carrier that ran every pair of cities nonstop would need an enormous fleet and would still fly many of those routes nearly empty; concentrating the traffic at a hub lets a small number of aircraft carry passengers whose origins and destinations are spread across dozens of cities.

The practical consequence for a traveller is that a journey between two spoke cities is usually ticketed as two or more segments, joined at a hub. The ground time at that point is a layover, and how short it can safely be is set by the airport's minimum connecting time. Hubs are usually organised around coordinated banks of arrivals and departures, which keeps the number of workable connections at a hub high and the waiting time between them short. The opposite arrangement is point-to-point flying, where the carrier runs a nonstop sector between two cities and does not send the passenger through a central airport at all; the difference between a direct flight and a nonstop is set out in direct flight vs nonstop.

Why do award itineraries often involve a connection?

An award is only as direct as the network behind it. If a programme's own flights and its partners' flights meet at a hub, that hub becomes the natural join in an award itinerary, and a city pair that has no nonstop service can only be reached by connecting somewhere. Which somewhere, and on whose aircraft, depends on the operating carrier.

United's MileagePlus rules put that boundary in writing: routing and destinations for award travel on airline partners are determined by the individual travel partners. [6] Those rules also attach conditions that matter most on multi-segment tickets — MileagePlus award tickets may be subject to the taxes, fees, tariffs, Contract of Carriage, ticket terms and re-accommodation policies of the carrier on which travel is scheduled. [6] After an award ticket is issued, a service charge may be imposed for each change or cancellation the member requests. [6]

Because the two legs of a connecting itinerary can sit on different carriers, the rules that apply when something goes wrong are not necessarily the rules of the airline that sold the ticket. The carrier actually operating the delayed or cancelled sector supplies the re-accommodation policy for its own flights. [6]

How is a connecting itinerary different from a point-to-point one?

A point-to-point trip is a single nonstop sector: one departure airport, one arrival airport, one operating carrier. A connecting itinerary is one ticket covering two or more sectors, and the sectors need not all be flown by the airline whose flight number appears on them. That second arrangement is a codeshare, where one carrier markets a flight that another carrier operates.

The distinction is not cosmetic. United's 2026 Premier Status Match Challenge terms make the operating carrier the test: the offer is valid only on flights operated by United or United Express, is not valid on United-marketed codeshare flights operated by other carriers, and the flights must be posted to the MileagePlus account to qualify. [7] The same terms define an activating flight for the challenge as one operated by United or United Express, so a partner-operated sector flown as part of a connection does not serve as the activating flight. [7] For a member building a long connecting routing through a hub, that means the marketing carrier on the boarding pass is a weaker signal than the operator named on the segment.

Exceptions and limits

• Partner routing. In United's MileagePlus programme the routing and destinations for award travel on airline partners are determined by the individual travel partners, not by United. [6] A connection that works on United's own flights may therefore not be bookable as a partner award.
• Spokes can lose service. MileagePlus awards for travel are valid only to destinations served both when the award ticket is issued and when the passenger departs, and neither United nor its partners is liable for schedule changes that cancel service to a destination. [6] A city that loses its link to the hub can take the whole award itinerary with it.
• Changes cost money. Once a MileagePlus award ticket is issued, a service charge may be imposed for each change or cancellation the member requests. [6]
• Connections on a status match. During a Premier Status Match Challenge, members may not have access to all reciprocal Premier benefits with United's partners, including access to Star Alliance lounges. [7] A connection through a partner hub is therefore not automatically a lounge stop.
• Programme scope. The rules quoted here are United MileagePlus terms for the 2026 programme year and the 2026 Premier Status Match Challenge; other carriers publish their own hub networks, award routings and connection rules.

Frequently asked questions

Can an award ticket connect on a partner airline?

Where a partner is involved, the partner decides. United's MileagePlus rules state that routing and destinations for award travel on airline partners are determined by the individual travel partners. [6]

Does a codeshare sector count toward a United status match?

No. The 2026 Premier Status Match Challenge is valid only on flights operated by United or United Express, not on United-marketed codeshare flights operated by other carriers, and the flights must post to the MileagePlus account. [7]

What happens if the airline stops flying to the spoke city before departure?

MileagePlus awards are valid only to destinations served both at the time of issue and at the time of departure, and neither United nor its partners is liable for schedule changes that cancel service to a destination. [6]

Who handles re-accommodation when a connecting sector is disrupted?

MileagePlus award tickets may be subject to the taxes, fees, tariffs, Contract of Carriage, ticket terms and re-accommodation policies of the carrier on which travel is scheduled. [6]

Related pages

Terms: layover, minimum connecting time, codeshare, direct flight vs nonstop. Browse the full frequent flyer glossary.

Sources

Sources checked on 18 October 2026. The programme-specific rules described here are United MileagePlus rules only; other programmes, including American Airlines AAdvantage, Delta SkyMiles, the British Airways Club and hotel loyalty programmes, are not covered on this page, and each of them publishes its own network and award-routing terms.

1. United MileagePlus program rules, checked 18 October 2026
2. United MileagePlus Premier Status Match Challenge terms, checked 18 October 2026