Reviewed by:
D. Goren
Head of Content
Updated Feb, 6
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Because airline child policies change — and parents shouldn’t have to hunt for answers.
Can you bring formula on a plane with Southwest Airlines when traveling with a baby?
Bringing formula on a Southwest flight with a baby
Yes — you can bring infant formula, breast milk, and baby food on Southwest flights. These items are exempt from the usual 3.4 oz (100 ml) liquid limit at security, but you must tell the security officer and they will screen the items (may include opening containers or additional testing).
Helpful tips for a smoother trip:
- Carry on preferred: Keep formula and milk in your carry-on so you can access it during the flight and avoid temperature changes in checked baggage.
- Larger quantities allowed: You may bring reasonable amounts for the trip — expect separate screening at the checkpoint.
- Frozen/iced items: Frozen or gel packs are allowed if frozen solid; partially melted packs may be subject to extra screening.
- Heating bottles: Flight attendants may offer hot water but may not heat bottles; plan for alternatives (insulated bottle warmer, pre-warmed bottles).
- Powdered formula: Allowed; you may be asked to prepare samples for inspection.
- Pack extras: Bring more formula than you expect to need in case of delays.
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