If you are not from Denver don't forget to change the location! :)

American Airlines

https://www.aa.com/booking/flights/choose-flights/flight1?bookingPathStateId=1658636209133-206&redirectSearchToLegacyAACom=false

Kayak

https://www.kayak.com/flights/DEN-PUJ/2023-05-02/2023-05-05?sort=bestflight_a

Delta

https://www.delta.com/flight-search/search-results?cacheKeySuffix=41d3f08f-e31a-4569-afb6-805f3940c17a

United Airlines

https://www.united.com/en/us/fsr/choose-flights?f=DEN&t=PUJ&d=2023-05-02&r=2023-05-05&sc=7%2C7&px=2%2C0%2C0%2C0%2C0%2C0%2C0%2C0&taxng=1&newHP=True&clm=7&st=bestmatches