[4] By 1960, West Coast had introduced new Fairchild F-27 turboprops with service to Twin Falls nonstop twice daily from both Boise (BOI) and Salt Lake City (SLC) as well as direct twice daily F-27 service from Seattle Boeing Field (BFI) via en route stops at Yakima, WA (YKM), Walla Walla, WA (ALW), Lewiston, ID (LWS) and Boise (BOI).

[6] According to the July 1, 1968 Air West system timetable, Twin Falls was receiving international service of a sorts at this time, which consisted of direct, no change of plane Fairchild F-27 service from Calgary in Alberta, Canada with this flight operating a southbound routing of Calgary (YYC) - Spokane (GEG) - Pullman, WA (PUW) - Lewiston, ID (LWS) - Boise (BOI) - Twin Falls (TWF) - Salt Lake City (SLC).

This same Air West timetable also lists several other multi-stop flights that served the airport at this time including a southbound Boise (BOI) - Twin Falls (TWF) - Salt Lake City (SLC) - Cedar City, UT (CDC) - Page, AZ (PGA) - Grand Canyon National Park Airport (GCN) - Prescott, AZ (PRC) - Phoenix (PHX) service flown with an F-27, a northbound Phoenix (PHX) - Cedar City (CDC) - Salt Lake City (SLC) - Twin Falls (TWF) - Boise (BOI) - Lewiston, ID (LWS) - Pullman, WA (PUW) - Walla Walla, WA (ALW) - Pasco, WA (PSC) - Yakima, WA (YKM) - Seattle Boeing Field (BFI) service also flown with an F-27, and a Twin Falls (TWF) - Burley, ID (BYI) - Sun Valley, ID (SUN) - Boise (BOI) - Ontario, OR (ONO) - Baker, OR (BKE) - Portland, OR (PDX) flight operated with a small Piper PA-31 Navajo twin prop aircraft.

By 1975, Hughes Airwest was continuing to operate all flights into Twin Falls with DC-9-10 and DC-9-30 jets with service to Boise (BOI), Salt Lake City (SLC), Stockton (SCK), Pocatello (PIH), San Francisco (SFO), Los Angeles (LAX), Orange County (SNA), Las Vegas (LAS), Seattle (SEA), Portland, OR (PDX), Spokane (GEG) and Idaho Falls (IDA).

[9] During the ski season in early 1976, the airline had added nonstop DC-9 flights between Twin Falls and both Los Angeles (LAX) and San Francisco (SFO) which were operated only on Saturdays.

[13] By 1984, Western Airlines was serving Twin Falls on a seasonal basis with nonstop flights from Los Angeles (LAX), San Francisco (SFO) and Salt Lake City (SLC) operated with Boeing 737-200 jetliners.

In the early 1970s, Trans Magic Airlines (TMA), which was based in Twin Falls, was operating a hub at the airport with flights to Boise, Burley, Coeur d'Alene, Idaho Falls, Jackpot, Lewiston, McCall, Mountain Home Air Force Base, Moscow, Pocatello, Pullman, Salt Lake City and Sun Valley with this commuter airline flying de Havilland Heron four engine prop aircraft and Piper Navajo twin engine prop aircraft.

[18] By 1974, Air Idaho was operating a small hub at the airport with nonstop service to Boise, Burley, Elko, Salt Lake City and Sun Valley flown with de Havilland Heron aircraft.

[20] Cascade Airways briefly served Twin Falls in 1980 with nonstop flights to Boise and Salt Lake City operated with Embraer EMB-110 Bandeirante commuter turboprops.

[24] Later in 1983, Transwestern was then acquired by and merged into Horizon Air which in turn continued to operate nonstop flights to Boise and Salt Lake City with Swearingen Metro III propjets.

[27] By 1999, SkyWest flying as the Delta Connection was the only airline serving Twin Falls and was continuing to operate nonstop Embraer EMB-120 Brasila flights to Salt Lake City.