SkyWest Airlines (IATA: OO) is the largest regional airline in the United States by fleet size, operating a large fleet of Embraer E175 and Bombardier CRJ-family regional jets. Unlike a typical regional carrier that flies for a single mainline partner, SkyWest is unique in that it operates flights under four different major airline brands, depending on the specific route: United Express, Delta Connection, American Eagle, and Alaska SkyWest.
SkyWest does not sell tickets under its own brand and has no independent fare class or reservation system. Each of its four mainline partners — United, Delta, American, and Alaska — handles reservations, ticket sales, pricing, and ground support for the SkyWest-operated flights on its respective routes. This makes SkyWest an important but largely invisible part of the US air travel network, quietly operating a substantial share of regional flying on behalf of the country's largest airlines.
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There is no separate SkyWest booking site, fare class, or independently searchable "SkyWest flight." SkyWest has no fare of its own — instead, depending on the specific route, SkyWest-operated flights are sold as United Express, Delta Connection, American Eagle, or Alaska SkyWest.
To fly on a SkyWest-operated aircraft, you need to search and book through whichever mainline carrier's brand applies to your route — united.com, delta.com, aa.com, or alaskaair.com — or via FareOptic's search for that specific airline. Your itinerary, ticket, and flight number will show as that mainline carrier's flight, even though SkyWest's aircraft and crew operate it. Delta Connection flights operated by SkyWest are booked the same way, directly through Delta, since FareOptic does not yet have a dedicated Delta Air Lines page.
If you're looking to book a flight rather than research the operator, search one of SkyWest's partner airlines instead:
SkyWest operates from numerous crew bases across the US to support its four partner networks, including these well-known airports.
SkyWest flies regional jets in a single Economy cabin, configured to whichever partner brand's standards apply on that route.
SkyWest does not have its own loyalty program. Because every ticket is sold and issued by one of its four mainline partners, passengers earn miles in whichever program applies to their specific flight — United MileagePlus, Delta SkyMiles, American AAdvantage, or Alaska Mileage Plan — exactly as they would on that partner's own mainline aircraft.
Baggage policy on SkyWest-operated flights varies entirely by which partner brand your ticket was sold under — there is no separate SkyWest baggage rule.
| Bag / Policy | SkyWest-Operated Flights (all partners) |
|---|---|
| Carry-on bag | Follows the policy of whichever partner brand sold your ticket (United, Delta, American, or Alaska) |
| Checked baggage | Follows the checked baggage fees and allowances of the mainline partner whose brand appears on your ticket |
| Gate-checked items | Common on smaller regional jets due to limited overhead bin space |
| Fare class differences | Allowance depends entirely on the partner airline's fare class purchased — SkyWest does not set its own baggage policy |
Always check united.com, delta.com, aa.com, or alaskaair.com — whichever brand sold your ticket — for the exact baggage allowance. SkyWest does not set or vary this policy independently.
Check in at united.com, delta.com, aa.com, or alaskaair.com using your confirmation number for that airline — whichever sold your ticket.
Boarding follows the boarding process of whichever mainline partner sold your ticket, regardless of SkyWest operating the aircraft.
SkyWest flights typically depart from regional jet gates or remote stands at partner hub airports — allow a little extra time to reach the gate.
Because tickets are sold under United, Delta, American, or Alaska fares, cancellation and change rules on SkyWest-operated flights follow that partner's policy exactly.
As US carrier tickets, most fares booked at least 7 days before departure can be cancelled within 24 hours of purchase for a full refund, including on SkyWest-operated segments.
If booked on a Basic Economy fare with any of the four partners, changes may not be permitted at all — this applies the same way whether the flight is mainline or SkyWest-operated.
All cancellations, changes, and refund requests are handled through whichever of United, Delta, American, or Alaska sold your ticket — SkyWest has no independent customer service channel for ticketing.
Embraer E175 and CRJ-family aircraft feature a smaller single-aisle cabin, typical of regional jets used for shorter partner-branded routes.
Complimentary soft drinks and snacks are offered on most flights, consistent with the standard domestic service of whichever partner sold the ticket.
Wi-Fi availability on SkyWest-operated regional jets varies by aircraft and partner brand — check availability for your specific flight.
Smaller regional jets have less overhead bin space, so larger carry-on bags are frequently gate-checked at no charge.
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Everything you need to know about SkyWest Airlines and booking its partner-operated flights on FareOptic
No. SkyWest Airlines does not sell tickets under its own brand and has no independent booking site, fare class, or reservation system. Depending on the specific route, SkyWest-operated flights are sold as United Express, Delta Connection, American Eagle, or Alaska SkyWest. To fly on a SkyWest-operated aircraft, you book through whichever mainline partner's brand applies to your route.
SkyWest is the largest regional airline in the United States by fleet size, and it has built separate codeshare and capacity-purchase agreements with United, Delta, American, and Alaska Airlines. Unlike smaller regional carriers that fly for a single mainline partner, SkyWest's scale allows it to operate aircraft under all four brands simultaneously, with each partner handling reservations, ticketing, and ground support for its respective routes.
Check your itinerary details when booking with United, Delta, American, or Alaska. Regional flights on smaller aircraft — typically Embraer E175 or CRJ-family jets — will often show 'Operated by SkyWest Airlines' in the flight details, even though the flight number and fare belong to the mainline partner.
Yes. Since the ticket is sold and issued by the mainline partner, you earn miles in whichever program applies to your specific flight — United MileagePlus, Delta SkyMiles, American AAdvantage, or Alaska Mileage Plan — exactly as you would on that partner's own mainline aircraft.
SkyWest operates a large fleet of Embraer E175 and Bombardier CRJ-family regional jets, configured to the specifications of whichever partner airline — United, Delta, American, or Alaska — the aircraft is flying for on a given route.
SkyWest Airlines is headquartered near Salt Lake City, Utah, and maintains crew bases across numerous airports nationwide to support its four partner networks, including Salt Lake City (SLC), Chicago O'Hare (ORD), and Los Angeles (LAX).