That's the best price we could find for select routes by $5. Buy Now at DealBase Tips On the DealBase landing page, click on "Sun Country Airlines" in the top line to see this sale. We found this price on flights departing on November 18 from Minneapolis, MN (MSP) to Philadelphia, PA (PHL). Book this travel deal by October 28 for flights from November 5 through December 17. All prices, dates, and booking details were valid at the time of publication.