No, it wouldn't be.
Greenland
Correctly spelled: mount kosciuskoThis is in Australia, in the Blue mountains about halfway between Sydney and Melbourne. This is the highest point in Australia.
The tiny town of Cook (population: 4) on the Nullarbor Plain is halfway between Adelaide, South Australia and Kalgoorlie, Western Australia.
The country that is approximately halfway between Philadelphia, PA, and Perth, Australia, is likely to be around the Indian Ocean, specifically near the island of Madagascar or the southern part of the Indian Ocean. However, the exact halfway point can vary depending on the specific flight path taken. Generally, it would fall into the region of the Indian Ocean, rather than a specific country.
Egypt
Dubai
Taiohae, French Polynesia is the halfway point between Tampa, Florida and Sydney, Australia. There is approximately 9,265 miles between the two locations.
Refueling points are normally halfway and include Singapore, Hong Kong and Dubai
Halfway Points
The halfway point between Sydney, Australia and Los Angeles, California is London, Kiribati. The closest major city that is roughly halfway is Honolulu, Hawaii.
The halfway point between Texas (TX) and Australia is Omoka, Cook Islands.