One-way ticket travelling to EU with non-EU wife and children

Ali Awan’s answer is based on the incorrect assumption that your wife can be denied entry by Greek authorities because of her lack of evidence of onward travel. As can be seen from your question, you are already aware that this is not the case.

The problem lies with incorrect, or at best insufficiently precise, information in TIMATIC. The airline may indeed act on this information, even though it is not correct in your wife’s case, and there may not be much you can do to persuade them otherwise.

According to the Greek government, at http://www.mfa.gr/usa/en/services/services-for-non-greeks/visa-section.html, your wife may be able to receive a visa that may help her get to Greece without proof of onward travel:

Spouses of Greek or European Union’s citizens

If you are married to a Greek or EU citizen and need to apply for a Schengen visa please bring the following documentation ONLY:

1. A valid passport or Travel document. (Please make sure that your passport will be valid for at least three (3) months after the date you exit the Schengen States).
2. A completed and signed visa application form.
3. One color photograph (2×2 inches) (Please note that the picture must be glued on the application form. Any photographs that are stapled will result in that application not being accepted).
4. Marriage certificate.
5. Proof that the spouse is a Greek or EU citizen (EU passport or identification card).

The visa is issued free of charge to all spouses of Greek or EU citizens.

This implies that Greece extends the right of freedom of movement to the spouses of Greek citizens, which means, as you note in your question, that your wife can stay with you in Greece as long as she likes, and that she can enter without any requirement to hold proof of onward travel.

On the other hand, you may be told that because she doesn’t need a Schengen visa, they won’t give her this visa; I know that the French consulate in New York has said as much to at least one couple.

Another worrying sign is the note about passport validity; obviously, this is confusing for people who plan to stay indefinitely in Greece or the Schengen area.

Furthermore, since the visa appears to be issued as a short-stay visa (type C) rather than a long-stay national visa (type D), there’s still a possibility that a traveler holding such a visa would be asked for proof of onward travel. There is a question on our sister site for expatriates about such a visa for Spain: Wife issued short-term visa for residence in Spain as spouse of EU citizen.

In answer to your actual question:

Can she really be denied passage for that reason?

Yes. The airline can deny boarding for pretty much any reason. If the airline decides to look into the onward-travel requirement noted in TIMATIC, you may be unable to convince them that it does not apply to your wife. If that happens, you can buy a fully refundable ticket from Greece to some non-Schengen destination, provided you have enough funds available, and then get it refunded after you enter Greece.

Can she really be denied passage for that reason?

Yes your wife can be denied boarding for not holding return/onward ticket if she is entering EU as a non EU national. Although as a Colombian, she cay stay in Schengen for up to 90 days within 180 days calender year, but still she can be asked to provide return air ticket by airline and border official in EU countries.

There are few requirements if your wife entering as a non EU citizen and return/roundtrip ticket is also one of the requirement:

Source: Europa.eu

“Border officials in EU countries may ask for other supporting documents such as an invitation letter, proof of lodging, return or round-trip ticket. For the precise requirements contact the local consular services of the EU country in question.”

However your query regarding Qatar airways (IATA/TIMATIC) yield the following result in official Qatar airways website:

Source:Qatar airways

National Colombia (CO) /Residence Australia (AU)
Embarkation Australia (AU) /Destination Greece (GR)

Greece (GR)

Passport required.
– Passports and other documents accepted for entry must be
valid for a minimum of 3 months beyond the period of
intended stay.

Visa required, except for Nationals of Colombia for a maximum

stay of 90 days. (SEE NOTE 56269)
NOTE 56269: The max. stay is granted within 180 days.
Additional Information:

• Visitors are required to hold necessary documents for their
  next destination and proof of sufficient funds to cover

  their stay .

• Valid visas in full, invalidated travel documents are
  accepted provided accompanied by a new travel document.

Warning:

• Passports and/or passport replacing documents issued more
  than 10 years prior to date of travel are not accepted.
• Visitors not holding return/onward tickets could be refused
  entry .

Therefore Qatar airways expecting to meet all the above requirement and return/onward ticket is a must and listed as a warning. This is also a requirement by border officials in EU countries.