The working mum had to push baby Aoife Belle's buggy with one hand while lugging a trolley stacked high with four, oversized suitcases with the other.
And she still managed to look effortlessly glamorous, despite her large load and long-haul flight from LA.
The singer -- who is married to English rugby star Ben Foden -- turned heads dressed in a pair of skinny blue jeans teamed with red pixie boots, a houndstooth jacket, black shades and a trilby.
At least Una had the luxury of flying business class for the lengthy flight. While on-board the plane, bandmember Mollie King tweeted a cute photo of Una Healy's daughter Aoife peering over the dividers between their business class beds.
She wrote: "Look at my on-board neighbour! I have a feeling I might be watching some cartoons en route home."
Speaking about his excitement about his wife Una and baby girl coming home after such a long stay, rugby star Ben Foden said: "The days of being a loner are over! My girls are heading to the airport as I tweet. Can't wait, it feels like Christmas."
Una's eight-month-old baby had become like the honorary sixth member of the band over the past number of months as she accompanied her mum everywhere during her American stay.
The chart-topping band had flown over to LA on August 8, just weeks after Rochelle Wiseman got hitched to JLS star Marvin Humes and Una's celeb-filled wedding to Ben in Tipperary.
Una and bandmates Rochelle, Mollie, Frankie Sandford and Vanessa White have spent the past few weeks Stateside working the music circuit in a bid to crack America and follow in the footsteps of stars like One Direction.
As well as filming a reality show for the E! network, they have also signed a US record deal and have been recording new songs with Rodney Jerkins and Diane Warren.
But now they're back home for a well-earned break to catch up with family and friends.