Airline Carry-On Restrictions Within Canada and the Continental U.S.
The USA Transportation Security Administration (TSA) and the Canadian Air Transport Security Authority (TSA) generally don't allow you to carry-on liquids in containers larger than 3 ounces (or 100 mL, 3.4 oz). However, lens care solution for contact lenses are considered "over-the-counter medications" that can be carried on the plane. Refer to TSA inspection criteria below:
Canadian Air Transport Security Authority
Contact lens solution: These items are considered to be essential non-prescription medications. You are allowed to carry volumes greater than 100 mL (3.4 oz.) in your carry-on baggage. These liquids must be declared to the Screening Officer separately.
USA Transportation Security Administration
Travelers passing through security checkpoints may bring all medications and related supplies—prescription, over-the-counter items, and homeopathic—through TSA security checkpoints after these items have been properly screened. Passengers are not limited in the amount or volume of these items carried in their carry-on baggage; however, if the medically necessary items are liquids, gels, and aerosols (LGAs) that exceed 3 ounces or are not contained in a single, one-quart, resealable, plastic bag (the 3-1-1 rule), they must be declared to a Transportation Security Officer (TSO) at the checkpoint for further inspection.
Other countries may have different airport restrictions on liquids so you may not be able to pack all the essential items you need in your hand luggage. So contact lens wearers will need to plan ahead.
To prepare you for all your travel needs, OPTI-FREE® PureMoist® Solution is available in 60 mL and 120 mL bottles in addition to the regular 300 mL bottles.